diff --git a/docs/.DS_Store b/docs/.DS_Store
new file mode 100644
index 00000000..70c33f05
Binary files /dev/null and b/docs/.DS_Store differ
diff --git a/docs/api/rest/index.rst b/docs/api/rest/index.rst
index cdf91044..c0133b94 100644
--- a/docs/api/rest/index.rst
+++ b/docs/api/rest/index.rst
@@ -43,6 +43,11 @@ If all you want is reference guides, skip straight to :ref:`rest-api-schemas`.
    The API version was bumped to v1.3 in Patchwork v3.1. The older APIs are
    still supported. For more information, refer to :ref:`rest-api-versions`.
 
+.. versionchanged:: 3.2
+
+   The API version was bumped to v1.4 in Patchwork v3.2. The older APIs are
+   still supported. For more information, refer to :ref:`rest-api-versions`.
+
 Getting Started
 ---------------
 
@@ -79,7 +84,7 @@ well-supported. To repeat the above example using `requests`:, run
     $ python
     >>> import json
     >>> import requests
-    >>> r = requests.get('https://patchwork.example.com/api/1.3/')
+    >>> r = requests.get('https://patchwork.example.com/api/1.4/')
     >>> print(json.dumps(r.json(), indent=2))
     {
         "bundles": "https://patchwork.example.com/api/1.4/bundles/",
diff --git a/docs/api/schemas/latest/patchwork.yaml b/docs/api/schemas/latest/patchwork.yaml
index b2bb220f..e58266e4 100644
--- a/docs/api/schemas/latest/patchwork.yaml
+++ b/docs/api/schemas/latest/patchwork.yaml
@@ -1203,7 +1203,7 @@ paths:
           title: ID
           type: integer
     get:
-      summary: Show a series.
+      summary: Return the details of a series.
       description: |
         Retrieve a series by its ID.
         A series is a collection of patches with an optional cover letter.
@@ -1223,6 +1223,128 @@ paths:
                 $ref: '#/components/schemas/Error'
       tags:
         - series
+    patch:
+      summary: Partially update a series.
+      description: |
+        Only updates the 'supersedes' field of a series. Replaces the whole set
+        of superseded series.
+
+        ::
+
+          Instance:
+              instance.supersedes = [
+                  'http://example.com/api/series/1/',
+                  'http://example.com/api/series/2/',
+                  'http://example.com/api/series/5/'
+              ]
+
+          Request:
+              PATCH {
+                  "supersedes": [
+                      'http://example.com/api/series/1/',
+                      'http://example.com/api/series/8/'
+                  ]
+              }
+
+          Result:
+              instance.supersedes = [
+                  'http://example.com/api/series/1/',
+                  'http://example.com/api/series/8/'
+              ]
+      security:
+        - basicAuth: []
+        - apiKeyAuth: []
+      requestBody:
+        $ref: '#/components/requestBodies/SeriesUpdate'
+      operationId: series_partial_update
+      responses:
+        '200':
+          description: 'Updated series'
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/Series'
+        '400':
+          description: 'Bad request'
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/Error'
+        '403':
+          description: 'Forbidden'
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/Error'
+        '404':
+          description: 'Not found'
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/Error'
+      tags:
+        - series
+    put:
+      summary: Update a series.
+      description: |
+        Only updates the 'supersedes' field of a series. Replaces the whole set
+        of superseded series.
+
+        ::
+
+          Instance:
+              instance.supersedes = [
+                  'http://example.com/api/series/1/',
+                  'http://example.com/api/series/2/',
+                  'http://example.com/api/series/5/'
+              ]
+
+          Request:
+              PUT {
+                  "supersedes": [
+                      'http://example.com/api/series/1/',
+                      'http://example.com/api/series/8/'
+                  ]
+              }
+
+          Result:
+              instance.supersedes = [
+                  'http://example.com/api/series/1/',
+                  'http://example.com/api/series/8/'
+              ]
+      security:
+        - basicAuth: []
+        - apiKeyAuth: []
+      requestBody:
+        $ref: '#/components/requestBodies/SeriesUpdate'
+      operationId: series_update
+      responses:
+        '200':
+          description: 'Updated series'
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/Series'
+        '400':
+          description: 'Bad request'
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/Error'
+        '403':
+          description: 'Forbidden'
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/Error'
+        '404':
+          description: 'Not found'
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/Error'
+      tags:
+        - series
   /api/users:
     get:
       summary: List users.
@@ -1506,6 +1628,14 @@ components:
         application/x-www-form-urlencoded:
           schema:
             $ref: '#/components/schemas/Project'
+    SeriesUpdate:
+      required: true
+      description: |
+        A series.
+      content:
+        application/json:
+          schema:
+            $ref: '#/components/schemas/SeriesUpdate'
     User:
       required: true
       description: |
@@ -2528,6 +2658,24 @@ components:
         show_dependencies:
           title: Whether the parse dependencies feature is enabled.
           type: boolean
+        show_series_versions:
+          title: Whether series versioning is enabled.
+          type: boolean
+    SeriesUpdate:
+      type: object
+      title: SeriesUpdate
+      description: |
+        Updatable fields af a series.
+      properties:
+        supersedes:
+          type: array
+          items:
+            oneOf:
+              - type: string
+                format: uri
+              - type: string
+                format: uri-reference
+          description: Series deprecated by the current series
     Series:
       type: object
       title: Series
@@ -2613,7 +2761,7 @@ components:
           type: array
           items:
             type: string
-            format: url
+            format: uri
           readOnly: true
           uniqueItems: true
         dependents:
@@ -2621,7 +2769,22 @@ components:
           type: array
           items:
             type: string
-            format: url
+            format: uri
+          readOnly: true
+          uniqueItems: true
+        supersedes:
+          title: Series deprecated by this series
+          type: array
+          items:
+            type: string
+            format: uri
+          uniqueItems: true
+        superseded:
+          title: Series that superseded this series
+          type: array
+          items:
+            type: string
+            format: uri
           readOnly: true
           uniqueItems: true
     User:
diff --git a/docs/api/schemas/patchwork.j2 b/docs/api/schemas/patchwork.j2
index f37d3213..5a7072cc 100644
--- a/docs/api/schemas/patchwork.j2
+++ b/docs/api/schemas/patchwork.j2
@@ -1228,7 +1228,7 @@ paths:
           title: ID
           type: integer
     get:
-      summary: Show a series.
+      summary: Return the details of a series.
       description: |
         Retrieve a series by its ID.
         A series is a collection of patches with an optional cover letter.
@@ -1248,6 +1248,130 @@ paths:
                 $ref: '#/components/schemas/Error'
       tags:
         - series
+{% if version >= (1, 4) %}
+    patch:
+      summary: Partially update a series.
+      description: |
+        Only updates the 'supersedes' field of a series. Replaces the whole set
+        of superseded series.
+
+        ::
+
+          Instance:
+              instance.supersedes = [
+                  'http://example.com/api/series/1/',
+                  'http://example.com/api/series/2/',
+                  'http://example.com/api/series/5/'
+              ]
+
+          Request:
+              PATCH {
+                  "supersedes": [
+                      'http://example.com/api/series/1/',
+                      'http://example.com/api/series/8/'
+                  ]
+              }
+
+          Result:
+              instance.supersedes = [
+                  'http://example.com/api/series/1/',
+                  'http://example.com/api/series/8/'
+              ]
+      security:
+        - basicAuth: []
+        - apiKeyAuth: []
+      requestBody:
+        $ref: '#/components/requestBodies/SeriesUpdate'
+      operationId: series_partial_update
+      responses:
+        '200':
+          description: 'Updated series'
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/Series'
+        '400':
+          description: 'Bad request'
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/Error'
+        '403':
+          description: 'Forbidden'
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/Error'
+        '404':
+          description: 'Not found'
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/Error'
+      tags:
+        - series
+    put:
+      summary: Update a series.
+      description: |
+        Only updates the 'supersedes' field of a series. Replaces the whole set
+        of superseded series.
+
+        ::
+
+          Instance:
+              instance.supersedes = [
+                  'http://example.com/api/series/1/',
+                  'http://example.com/api/series/2/',
+                  'http://example.com/api/series/5/'
+              ]
+
+          Request:
+              PUT {
+                  "supersedes": [
+                      'http://example.com/api/series/1/',
+                      'http://example.com/api/series/8/'
+                  ]
+              }
+
+          Result:
+              instance.supersedes = [
+                  'http://example.com/api/series/1/',
+                  'http://example.com/api/series/8/'
+              ]
+      security:
+        - basicAuth: []
+        - apiKeyAuth: []
+      requestBody:
+        $ref: '#/components/requestBodies/SeriesUpdate'
+      operationId: series_update
+      responses:
+        '200':
+          description: 'Updated series'
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/Series'
+        '400':
+          description: 'Bad request'
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/Error'
+        '403':
+          description: 'Forbidden'
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/Error'
+        '404':
+          description: 'Not found'
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/Error'
+      tags:
+        - series
+{% endif %}
   /api/{{ version_url }}users:
     get:
       summary: List users.
@@ -1547,6 +1671,16 @@ components:
         application/x-www-form-urlencoded:
           schema:
             $ref: '#/components/schemas/Project'
+{% if version >= (1, 4) %}
+    SeriesUpdate:
+      required: true
+      description: |
+        A series.
+      content:
+        application/json:
+          schema:
+            $ref: '#/components/schemas/SeriesUpdate'
+{% endif %}
     User:
       required: true
       description: |
@@ -2621,6 +2755,26 @@ components:
         show_dependencies:
           title: Whether the parse dependencies feature is enabled.
           type: boolean
+        show_series_versions:
+          title: Whether series versioning is enabled.
+          type: boolean
+{% endif %}
+{% if version >= (1, 4) %}
+    SeriesUpdate:
+      type: object
+      title: SeriesUpdate
+      description: |
+        Updatable fields af a series.
+      properties:
+        supersedes:
+          type: array
+          items:
+            oneOf:
+              - type: string
+                format: uri
+              - type: string
+                format: uri-reference
+          description: Series deprecated by the current series
 {% endif %}
     Series:
       type: object
@@ -2710,7 +2864,7 @@ components:
           type: array
           items:
             type: string
-            format: url
+            format: uri
           readOnly: true
           uniqueItems: true
         dependents:
@@ -2718,7 +2872,22 @@ components:
           type: array
           items:
             type: string
-            format: url
+            format: uri
+          readOnly: true
+          uniqueItems: true
+        supersedes:
+          title: Series deprecated by this series
+          type: array
+          items:
+            type: string
+            format: uri
+          uniqueItems: true
+        superseded:
+          title: Series that superseded this series
+          type: array
+          items:
+            type: string
+            format: uri
           readOnly: true
           uniqueItems: true
 {% endif %}
diff --git a/docs/api/schemas/v1.0/patchwork.yaml b/docs/api/schemas/v1.0/patchwork.yaml
index d317f53f..93ee6fe2 100644
--- a/docs/api/schemas/v1.0/patchwork.yaml
+++ b/docs/api/schemas/v1.0/patchwork.yaml
@@ -916,7 +916,7 @@ paths:
           title: ID
           type: integer
     get:
-      summary: Show a series.
+      summary: Return the details of a series.
       description: |
         Retrieve a series by its ID.
         A series is a collection of patches with an optional cover letter.
diff --git a/docs/api/schemas/v1.1/patchwork.yaml b/docs/api/schemas/v1.1/patchwork.yaml
index ce17d2f2..f2649b43 100644
--- a/docs/api/schemas/v1.1/patchwork.yaml
+++ b/docs/api/schemas/v1.1/patchwork.yaml
@@ -916,7 +916,7 @@ paths:
           title: ID
           type: integer
     get:
-      summary: Show a series.
+      summary: Return the details of a series.
       description: |
         Retrieve a series by its ID.
         A series is a collection of patches with an optional cover letter.
diff --git a/docs/api/schemas/v1.2/patchwork.yaml b/docs/api/schemas/v1.2/patchwork.yaml
index dddaafe5..488352d6 100644
--- a/docs/api/schemas/v1.2/patchwork.yaml
+++ b/docs/api/schemas/v1.2/patchwork.yaml
@@ -1059,7 +1059,7 @@ paths:
           title: ID
           type: integer
     get:
-      summary: Show a series.
+      summary: Return the details of a series.
       description: |
         Retrieve a series by its ID.
         A series is a collection of patches with an optional cover letter.
diff --git a/docs/api/schemas/v1.3/patchwork.yaml b/docs/api/schemas/v1.3/patchwork.yaml
index 41b44832..77e65f12 100644
--- a/docs/api/schemas/v1.3/patchwork.yaml
+++ b/docs/api/schemas/v1.3/patchwork.yaml
@@ -1203,7 +1203,7 @@ paths:
           title: ID
           type: integer
     get:
-      summary: Show a series.
+      summary: Return the details of a series.
       description: |
         Retrieve a series by its ID.
         A series is a collection of patches with an optional cover letter.
diff --git a/docs/api/schemas/v1.4/patchwork.yaml b/docs/api/schemas/v1.4/patchwork.yaml
index 036fe15f..9e5abf3f 100644
--- a/docs/api/schemas/v1.4/patchwork.yaml
+++ b/docs/api/schemas/v1.4/patchwork.yaml
@@ -1203,7 +1203,7 @@ paths:
           title: ID
           type: integer
     get:
-      summary: Show a series.
+      summary: Return the details of a series.
       description: |
         Retrieve a series by its ID.
         A series is a collection of patches with an optional cover letter.
@@ -1223,6 +1223,128 @@ paths:
                 $ref: '#/components/schemas/Error'
       tags:
         - series
+    patch:
+      summary: Partially update a series.
+      description: |
+        Only updates the 'supersedes' field of a series. Replaces the whole set
+        of superseded series.
+
+        ::
+
+          Instance:
+              instance.supersedes = [
+                  'http://example.com/api/series/1/',
+                  'http://example.com/api/series/2/',
+                  'http://example.com/api/series/5/'
+              ]
+
+          Request:
+              PATCH {
+                  "supersedes": [
+                      'http://example.com/api/series/1/',
+                      'http://example.com/api/series/8/'
+                  ]
+              }
+
+          Result:
+              instance.supersedes = [
+                  'http://example.com/api/series/1/',
+                  'http://example.com/api/series/8/'
+              ]
+      security:
+        - basicAuth: []
+        - apiKeyAuth: []
+      requestBody:
+        $ref: '#/components/requestBodies/SeriesUpdate'
+      operationId: series_partial_update
+      responses:
+        '200':
+          description: 'Updated series'
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/Series'
+        '400':
+          description: 'Bad request'
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/Error'
+        '403':
+          description: 'Forbidden'
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/Error'
+        '404':
+          description: 'Not found'
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/Error'
+      tags:
+        - series
+    put:
+      summary: Update a series.
+      description: |
+        Only updates the 'supersedes' field of a series. Replaces the whole set
+        of superseded series.
+
+        ::
+
+          Instance:
+              instance.supersedes = [
+                  'http://example.com/api/series/1/',
+                  'http://example.com/api/series/2/',
+                  'http://example.com/api/series/5/'
+              ]
+
+          Request:
+              PUT {
+                  "supersedes": [
+                      'http://example.com/api/series/1/',
+                      'http://example.com/api/series/8/'
+                  ]
+              }
+
+          Result:
+              instance.supersedes = [
+                  'http://example.com/api/series/1/',
+                  'http://example.com/api/series/8/'
+              ]
+      security:
+        - basicAuth: []
+        - apiKeyAuth: []
+      requestBody:
+        $ref: '#/components/requestBodies/SeriesUpdate'
+      operationId: series_update
+      responses:
+        '200':
+          description: 'Updated series'
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/Series'
+        '400':
+          description: 'Bad request'
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/Error'
+        '403':
+          description: 'Forbidden'
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/Error'
+        '404':
+          description: 'Not found'
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/Error'
+      tags:
+        - series
   /api/1.4/users:
     get:
       summary: List users.
@@ -1506,6 +1628,14 @@ components:
         application/x-www-form-urlencoded:
           schema:
             $ref: '#/components/schemas/Project'
+    SeriesUpdate:
+      required: true
+      description: |
+        A series.
+      content:
+        application/json:
+          schema:
+            $ref: '#/components/schemas/SeriesUpdate'
     User:
       required: true
       description: |
@@ -2528,6 +2658,24 @@ components:
         show_dependencies:
           title: Whether the parse dependencies feature is enabled.
           type: boolean
+        show_series_versions:
+          title: Whether series versioning is enabled.
+          type: boolean
+    SeriesUpdate:
+      type: object
+      title: SeriesUpdate
+      description: |
+        Updatable fields af a series.
+      properties:
+        supersedes:
+          type: array
+          items:
+            oneOf:
+              - type: string
+                format: uri
+              - type: string
+                format: uri-reference
+          description: Series deprecated by the current series
     Series:
       type: object
       title: Series
@@ -2613,7 +2761,7 @@ components:
           type: array
           items:
             type: string
-            format: url
+            format: uri
           readOnly: true
           uniqueItems: true
         dependents:
@@ -2621,7 +2769,22 @@ components:
           type: array
           items:
             type: string
-            format: url
+            format: uri
+          readOnly: true
+          uniqueItems: true
+        supersedes:
+          title: Series deprecated by this series
+          type: array
+          items:
+            type: string
+            format: uri
+          uniqueItems: true
+        superseded:
+          title: Series that superseded this series
+          type: array
+          items:
+            type: string
+            format: uri
           readOnly: true
           uniqueItems: true
     User:
diff --git a/patchwork/admin.py b/patchwork/admin.py
index d1c389a1..26132790 100644
--- a/patchwork/admin.py
+++ b/patchwork/admin.py
@@ -151,7 +151,7 @@ class SeriesAdmin(admin.ModelAdmin):
     readonly_fields = ('received_total', 'received_all')
     search_fields = ('submitter__name', 'submitter__email')
     exclude = ('patches',)
-    filter_horizontal = ('dependencies',)
+    filter_horizontal = ('dependencies', 'supersedes')
     inlines = (PatchInline,)
 
     def received_all(self, series):
diff --git a/patchwork/api/base.py b/patchwork/api/base.py
index 16e5cb8d..cdcfd9f6 100644
--- a/patchwork/api/base.py
+++ b/patchwork/api/base.py
@@ -96,7 +96,7 @@ def get_paginated_response(self, data):
 
 class PatchworkPermission(permissions.BasePermission):
     """
-    This permission works for Project, Patch, PatchComment
+    This permission works for Project, Patch, Series, PatchComment
     and CoverComment model objects
     """
 
diff --git a/patchwork/api/project.py b/patchwork/api/project.py
index 6307dda0..5d21637c 100644
--- a/patchwork/api/project.py
+++ b/patchwork/api/project.py
@@ -40,6 +40,7 @@ class Meta:
             'list_archive_url_format',
             'commit_url_format',
             'show_dependencies',
+            'show_series_versions',
         )
         read_only_fields = (
             'name',
@@ -56,7 +57,7 @@ class Meta:
                 'list_archive_url_format',
                 'commit_url_format',
             ),
-            '1.4': ('show_dependencies',),
+            '1.4': ('show_dependencies', 'show_series_versions'),
         }
         extra_kwargs = {
             'url': {'view_name': 'api-project-detail'},
diff --git a/patchwork/api/series.py b/patchwork/api/series.py
index c9f5f54b..f06376c1 100644
--- a/patchwork/api/series.py
+++ b/patchwork/api/series.py
@@ -4,11 +4,10 @@
 # SPDX-License-Identifier: GPL-2.0-or-later
 
 from rest_framework.generics import ListAPIView
-from rest_framework.generics import RetrieveAPIView
-from rest_framework.serializers import (
-    SerializerMethodField,
-    HyperlinkedRelatedField,
-)
+from rest_framework.generics import RetrieveUpdateAPIView
+from rest_framework.serializers import SerializerMethodField
+from rest_framework.serializers import HyperlinkedRelatedField
+from rest_framework.serializers import ValidationError
 
 from patchwork.api.base import BaseHyperlinkedModelSerializer
 from patchwork.api.base import PatchworkPermission
@@ -33,6 +32,55 @@ class SeriesSerializer(BaseHyperlinkedModelSerializer):
     dependents = HyperlinkedRelatedField(
         read_only=True, view_name='api-series-detail', many=True
     )
+    supersedes = HyperlinkedRelatedField(
+        view_name='api-series-detail',
+        queryset=Series.objects.select_related('project').all(),
+        required=False,
+        many=True,
+    )
+    superseded = HyperlinkedRelatedField(
+        read_only=True,
+        view_name='api-series-detail',
+        many=True,
+    )
+
+    def update(self, instance, validated_data, *args, **kwargs):
+        allowed_fields = {'supersedes'}
+        incoming_fields = set(validated_data.keys())
+
+        if not incoming_fields.issubset(allowed_fields):
+            invalid_fields = incoming_fields - allowed_fields
+            raise ValidationError(
+                {
+                    'detail': 'Cannot update fields: '
+                    f"{', '.join(invalid_fields)}. Only 'supersedes' can be "
+                    'updated.'
+                }
+            )
+
+        if 'supersedes' in validated_data:
+            supersedes = validated_data.pop('supersedes', [])
+
+            if instance in supersedes:
+                raise ValidationError(
+                    {'detail': 'A series cannot be linked to itself.'}
+                )
+
+            if any(
+                series.project != instance.project for series in supersedes
+            ):
+                raise ValidationError(
+                    {'detail': 'Series must belong to the same project.'}
+                )
+
+            try:
+                instance.supersedes.set(supersedes)
+            except Series.DoesNotExist:
+                raise ValidationError(
+                    {'detail': 'Unable to find one of the referenced series'}
+                )
+
+        return instance
 
     def get_web_url(self, instance):
         request = self.context.get('request')
@@ -48,6 +96,11 @@ def to_representation(self, instance):
                 if field in self.fields:
                     del self.fields[field]
 
+        if not instance.project.show_series_versions:
+            for field in ('supersedes', 'superseded'):
+                if field in self.fields:
+                    del self.fields[field]
+
         data = super().to_representation(instance)
 
         return data
@@ -71,6 +124,8 @@ class Meta:
             'patches',
             'dependencies',
             'dependents',
+            'supersedes',
+            'superseded',
         )
         read_only_fields = (
             'date',
@@ -83,10 +138,11 @@ class Meta:
             'patches',
             'dependencies',
             'dependents',
+            'superseded',
         )
         versioned_fields = {
             '1.1': ('web_url',),
-            '1.4': ('dependencies', 'dependents'),
+            '1.4': ('dependencies', 'dependents', 'supersedes', 'superseded'),
         }
         extra_kwargs = {
             'url': {'view_name': 'api-series-detail'},
@@ -105,6 +161,8 @@ def get_queryset(self):
                 'cover_letter__project',
                 'dependencies',
                 'dependents',
+                'supersedes',
+                'superseded',
             )
             .select_related('submitter', 'project')
         )
@@ -119,7 +177,40 @@ class SeriesList(SeriesMixin, ListAPIView):
     ordering = 'id'
 
 
-class SeriesDetail(SeriesMixin, RetrieveAPIView):
-    """Show a series."""
+class SeriesDetail(SeriesMixin, RetrieveUpdateAPIView):
+    """Show a series.
+
+    retrieve:
+        Return the details of a series.
+
+    update:
+        Only updates the 'supersedes' field of a series. Replaces the whole set
+        of superseded series.
+
+        ::
+
+        Instance:
+            instance.supersedes = [
+                'http://example.com/api/series/1/',
+                'http://example.com/api/series/2/',
+                'http://example.com/api/series/5/'
+            ]
+
+        Request:
+            PUT/PATCH {
+                "supersedes": [
+                    'http://example.com/api/series/1/',
+                    'http://example.com/api/series/8/'
+                ]
+            }
+
+        Result:
+            instance.supersedes = [
+                'http://example.com/api/series/1/',
+                'http://example.com/api/series/8/'
+            ]
+    """
 
-    pass
+    # PUT operation will behave as a partial update
+    def put(self, request, *args, **kwargs):
+        return self.partial_update(request, *args, **kwargs)
diff --git a/patchwork/migrations/0049_series_sequences.py b/patchwork/migrations/0049_series_sequences.py
new file mode 100644
index 00000000..c45a1def
--- /dev/null
+++ b/patchwork/migrations/0049_series_sequences.py
@@ -0,0 +1,31 @@
+# Generated by Django 5.1.4 on 2025-03-20 01:28
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ('patchwork', '0048_series_dependencies'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='series',
+            name='supersedes',
+            field=models.ManyToManyField(
+                blank=True,
+                help_text='Previous versions of this patch.',
+                related_name='superseded',
+                to='patchwork.series',
+            ),
+        ),
+        migrations.AddField(
+            model_name='project',
+            name='show_series_versions',
+            field=models.BooleanField(
+                default=False,
+                help_text='Enable parsing series previous versions on patches '
+                'and cover letters.',
+            ),
+        ),
+    ]
diff --git a/patchwork/models.py b/patchwork/models.py
index ae2f4a6d..f0ea5171 100644
--- a/patchwork/models.py
+++ b/patchwork/models.py
@@ -104,6 +104,11 @@ class Project(models.Model):
         default=False,
         help_text='Enable dependency tracking for patches and cover letters.',
     )
+    show_series_versions = models.BooleanField(
+        default=False,
+        help_text='Enable parsing series previous versions on patches and '
+        'cover letters.',
+    )
     use_tags = models.BooleanField(default=True)
 
     def is_editable(self, user):
@@ -858,6 +863,15 @@ class Series(FilenameMixin, models.Model):
         related_query_name='dependent',
     )
 
+    # versioning
+    supersedes = models.ManyToManyField(
+        'self',
+        symmetrical=False,
+        blank=True,
+        help_text='Previous versions of this patch.',
+        related_name='superseded',
+    )
+
     # metadata
     name = models.CharField(
         max_length=255,
@@ -889,6 +903,15 @@ def _format_name(obj):
             return match.group(2)
         return obj.name.strip()
 
+    def is_editable(self, user):
+        if not user.is_authenticated:
+            return False
+
+        if user.is_superuser or user == self.submitter.user:
+            return True
+
+        return self.project.is_editable(user)
+
     @property
     def received_total(self):
         return self.patches.count()
diff --git a/patchwork/tests/api/test_series.py b/patchwork/tests/api/test_series.py
index 24d7d9a6..f223b42b 100644
--- a/patchwork/tests/api/test_series.py
+++ b/patchwork/tests/api/test_series.py
@@ -44,6 +44,7 @@ def assertSerialized(self, series_obj, series_json):
         self.assertIn(series_obj.get_mbox_url(), series_json['mbox'])
         self.assertIn(series_obj.get_absolute_url(), series_json['web_url'])
 
+        # dependencies
         for dep, item in zip(
             series_obj.dependencies.all(), series_json['dependencies']
         ):
@@ -58,6 +59,21 @@ def assertSerialized(self, series_obj, series_json):
                 reverse('api-series-detail', kwargs={'pk': dep.id}), item
             )
 
+        # versioning
+        for ver, item in zip(
+            series_obj.supersedes.all(), series_json['supersedes']
+        ):
+            self.assertIn(
+                reverse('api-series-detail', kwargs={'pk': ver.id}), item
+            )
+
+        for ver, item in zip(
+            series_obj.superseded.all(), series_json['superseded']
+        ):
+            self.assertIn(
+                reverse('api-series-detail', kwargs={'pk': ver.id}), item
+            )
+
         # nested fields
 
         self.assertEqual(series_obj.project.id, series_json['project']['id'])
@@ -79,7 +95,9 @@ def test_list_empty(self):
 
     def _create_series(self):
         project_obj = create_project(
-            linkname='myproject', show_dependencies=True
+            linkname='myproject',
+            show_dependencies=True,
+            show_series_versions=True,
         )
         person_obj = create_person(email='test@example.com')
         series_obj = create_series(project=project_obj, submitter=person_obj)
@@ -197,7 +215,7 @@ def test_list_bug_335(self):
             create_cover(series=series_obj)
             create_patch(series=series_obj)
 
-        with self.assertNumQueries(8):
+        with self.assertNumQueries(10):
             self.client.get(self.api_url())
 
     @utils.store_samples('series-detail')
@@ -225,6 +243,8 @@ def test_detail_version_1_3(self):
         self.assertIn('web_url', resp.data['patches'][0])
         self.assertNotIn('dependents', resp.data)
         self.assertNotIn('dependencies', resp.data)
+        self.assertNotIn('superseded', resp.data)
+        self.assertNotIn('supersedes', resp.data)
 
     @utils.store_samples('series-detail-1-0')
     def test_detail_version_1_0(self):
@@ -251,8 +271,8 @@ def test_detail_invalid(self):
         with self.assertRaises(NoReverseMatch):
             self.client.get(self.api_url('foo'))
 
-    def test_create_update_delete(self):
-        """Ensure creates, updates and deletes aren't allowed"""
+    def test_create_delete(self):
+        """Ensure creates and deletes aren't allowed"""
         user = create_maintainer()
         user.is_superuser = True
         user.save()
@@ -263,8 +283,306 @@ def test_create_update_delete(self):
 
         series = create_series()
 
-        resp = self.client.patch(self.api_url(series.id), {'name': 'Test'})
-        self.assertEqual(status.HTTP_405_METHOD_NOT_ALLOWED, resp.status_code)
-
         resp = self.client.delete(self.api_url(series.id))
         self.assertEqual(status.HTTP_405_METHOD_NOT_ALLOWED, resp.status_code)
+
+    def test_series_versioning(self):
+        """Test toggling versioning on and off."""
+        project = create_project(
+            show_dependencies=True,
+            show_series_versions=True,
+        )
+        submitter = create_person(email='test@example.com')
+        series_a = create_series(project=project, submitter=submitter)
+        create_cover(series=series_a)
+        create_patch(series=series_a)
+        series_b = create_series(project=project, submitter=submitter)
+        create_cover(series=series_b)
+        create_patch(series=series_b)
+        series_a.supersedes.set([series_b])
+
+        resp = self.client.get(self.api_url())
+        self.assertEqual(2, len(resp.data))
+        for series_data in resp.data:
+            self.assertIn('supersedes', series_data)
+            self.assertIn('superseded', series_data)
+
+        project.show_series_versions = False
+        project.save()
+
+        resp = self.client.get(self.api_url())
+        self.assertEqual(2, len(resp.data))
+        for series_data in resp.data:
+            self.assertNotIn('supersedes', series_data)
+            self.assertNotIn('superseded', series_data)
+
+
+@override_settings(PATCHWORK_API_ENABLED=True)
+class TestSeriesDetailUpdate(utils.APITestCase):
+    @staticmethod
+    def api_url(item, version=None):
+        kwargs = {}
+        if version:
+            kwargs['version'] = version
+
+        kwargs['pk'] = item
+        return reverse('api-series-detail', kwargs=kwargs)
+
+    def _get_series_url(self, series, request=None):
+        url = reverse(
+            'api-series-detail',
+            kwargs={'pk': series.id},
+        )
+        # Build absolute uri for spec validation
+        if request is not None:
+            return request.build_absolute_uri(url)
+
+        return url
+
+    def _assert_contains_series_url(self, response, key, series):
+        self.assertEqual(response.status_code, status.HTTP_200_OK)
+        container = response.json().get(key)
+        for item in container:
+            if item.endswith(
+                self._get_series_url(series, response.wsgi_request)
+            ):
+                return True
+        raise AssertionError(
+            f'No item in {container} ends with {self._get_series_url(series)}'
+        )
+
+    def setUp(self):
+        super().setUp()
+        self.client.defaults.update(
+            {'HTTP_HOST': 'example.com', 'SERVER_NAME': 'example.com'}
+        )
+        self.project = create_project(
+            linkname='myproject',
+            show_dependencies=True,
+            show_series_versions=True,
+        )
+        user = create_user()
+        self.submitter = create_person(email='test@example.com', user=user)
+
+        self.superseded = create_series(
+            project=self.project, submitter=self.submitter
+        )
+        create_cover(series=self.superseded)
+        create_patch(series=self.superseded)
+
+        self.series = create_series(
+            project=self.project, submitter=self.submitter
+        )
+        create_cover(series=self.series)
+        create_patch(series=self.series)
+
+        self.url = self._get_series_url(self.series)
+
+    def authenticate_as_submitter(self):
+        self.client.authenticate(user=self.submitter.user)
+
+    def authenticate_as_maintainer(self):
+        user = create_maintainer(self.project)
+        self.client.authenticate(user=user)
+
+    def authenticate_as_superuser(self):
+        user = create_user()
+        user.is_superuser = True
+        user.save()
+        self.client.authenticate(user=user)
+
+    def authenticate_as_unrelated_user(self):
+        user = create_user()
+        self.client.authenticate(user=user)
+
+    # PATCH tests
+    def test_patch_series_as_submitter(self):
+        series_b = create_series(
+            project=self.project, submitter=self.submitter
+        )
+        self.authenticate_as_submitter()
+        response = self.client.patch(
+            self.url,
+            {'supersedes': [self._get_series_url(self.superseded)]},
+            format='json',
+        )
+        self._assert_contains_series_url(
+            response, 'supersedes', self.superseded
+        )
+
+        # Add series_b and remove superseded
+        response = self.client.patch(
+            self.url,
+            {'supersedes': [self._get_series_url(series_b)]},
+            format='json',
+        )
+        self._assert_contains_series_url(response, 'supersedes', series_b)
+        with self.assertRaises(AssertionError):
+            self._assert_contains_series_url(
+                response, 'supersedes', self.superseded
+            )
+
+    def test_patch_series_as_maintainer(self):
+        self.authenticate_as_maintainer()
+        response = self.client.patch(
+            self.url,
+            {'supersedes': [self._get_series_url(self.superseded)]},
+            format='json',
+        )
+        self._assert_contains_series_url(
+            response, 'supersedes', self.superseded
+        )
+
+    def test_patch_series_as_superuser(self):
+        self.authenticate_as_superuser()
+        response = self.client.patch(
+            self.url,
+            {'supersedes': [self._get_series_url(self.superseded)]},
+            format='json',
+        )
+        self._assert_contains_series_url(
+            response, 'supersedes', self.superseded
+        )
+
+    def test_patch_series_as_unrelated_user_forbidden(self):
+        self.authenticate_as_unrelated_user()
+        response = self.client.patch(
+            self.url,
+            {'supersedes': [self._get_series_url(self.superseded)]},
+            format='json',
+        )
+        self.assertEqual(response.status_code, status.HTTP_403_FORBIDDEN)
+
+    def test_patch_series_unauthenticated_forbidden(self):
+        response = self.client.patch(
+            self.url,
+            {'supersedes': [self._get_series_url(self.superseded)]},
+            format='json',
+        )
+        self.assertEqual(response.status_code, status.HTTP_403_FORBIDDEN)
+
+    # PUT tests
+    def test_put_series_as_submitter(self):
+        series_b = create_series(
+            project=self.project, submitter=self.submitter
+        )
+        self.authenticate_as_submitter()
+        response = self.client.put(
+            self.url,
+            {'supersedes': [self._get_series_url(self.superseded)]},
+            format='json',
+        )
+        self._assert_contains_series_url(
+            response, 'supersedes', self.superseded
+        )
+
+        # Rewrite the whole supersedes attribute
+        response = self.client.put(
+            self.url,
+            {'supersedes': [self._get_series_url(series_b)]},
+            format='json',
+        )
+        self._assert_contains_series_url(response, 'supersedes', series_b)
+        with self.assertRaises(AssertionError):
+            self._assert_contains_series_url(
+                response, 'supersedes', self.superseded
+            )
+
+    def test_put_series_as_maintainer(self):
+        self.authenticate_as_maintainer()
+        response = self.client.put(
+            self.url,
+            {'supersedes': [self._get_series_url(self.superseded)]},
+            format='json',
+        )
+        self._assert_contains_series_url(
+            response, 'supersedes', self.superseded
+        )
+
+    def test_put_series_as_superuser(self):
+        self.authenticate_as_superuser()
+        response = self.client.put(
+            self.url,
+            {'supersedes': [self._get_series_url(self.superseded)]},
+            format='json',
+        )
+        self._assert_contains_series_url(
+            response, 'supersedes', self.superseded
+        )
+
+    def test_put_series_as_unrelated_user_forbidden(self):
+        self.authenticate_as_unrelated_user()
+        response = self.client.put(
+            self.url,
+            {'supersedes': [self._get_series_url(self.superseded)]},
+            format='json',
+        )
+        self.assertEqual(response.status_code, status.HTTP_403_FORBIDDEN)
+
+    def test_put_series_unauthenticated_forbidden(self):
+        response = self.client.put(
+            self.url,
+            {'supersedes': [self._get_series_url(self.superseded)]},
+            format='json',
+        )
+        self.assertEqual(response.status_code, status.HTTP_403_FORBIDDEN)
+
+    # Invalid input tests
+    def test_patch_invalid_input(self):
+        self.authenticate_as_maintainer()
+        response = self.client.patch(self.url, {'name': 'name'}, format='json')
+        self.assertEqual(response.status_code, status.HTTP_400_BAD_REQUEST)
+
+    def test_put_invalid_input(self):
+        self.authenticate_as_maintainer()
+        response = self.client.put(self.url, {'name': 'name'}, format='json')
+        self.assertEqual(response.status_code, status.HTTP_400_BAD_REQUEST)
+
+    def test_patch_invalid_series_id(self):
+        self.authenticate_as_maintainer()
+        response = self.client.patch(
+            self.url,
+            {'supersedes': ['/api/series/99999999/']},
+            format='json',
+        )
+        self.assertEqual(response.status_code, status.HTTP_400_BAD_REQUEST)
+
+    def test_put_invalid_series_id(self):
+        self.authenticate_as_maintainer()
+        response = self.client.put(
+            self.url,
+            {'supersedes': ['/api/series/99999999/']},
+            format='json',
+        )
+        self.assertEqual(response.status_code, status.HTTP_400_BAD_REQUEST)
+
+    def test_self_link_validation(self):
+        self.authenticate_as_submitter()
+
+        response = self.client.put(
+            self.url,
+            {'supersedes': [self._get_series_url(self.series)]},
+            format='json',
+        )
+
+        self.assertContains(
+            response,
+            'A series cannot be linked to itself.',
+            status_code=status.HTTP_400_BAD_REQUEST,
+        )
+
+    def test_cross_project_validation(self):
+        self.authenticate_as_submitter()
+        series_x = create_series()
+
+        response = self.client.put(
+            self.url,
+            {'supersedes': [self._get_series_url(series_x)]},
+            format='json',
+        )
+
+        self.assertContains(
+            response,
+            'Series must belong to the same project.',
+            status_code=status.HTTP_400_BAD_REQUEST,
+        )
diff --git a/patchwork/tests/test_series.py b/patchwork/tests/test_series.py
index e5f60e3a..66c61c7b 100644
--- a/patchwork/tests/test_series.py
+++ b/patchwork/tests/test_series.py
@@ -1081,3 +1081,27 @@ def test_dependency_multi_2(self):
         self.assertEqual(series2.dependencies.count(), 1)
         self.assertEqual(series3.dependencies.count(), 2)
         self.assertEqual(series3.dependents.count(), 0)
+
+
+class SeriesVersioningTestCase(TestCase):
+    def setUp(self):
+        self.series_a = utils.create_series()  # main series
+        self.project = self.series_a.project  # main project
+        self.submitter = self.series_a.submitter  # main user
+
+        # same project series
+        self.series_b = utils.create_series(project=self.project)
+        self.series_c = utils.create_series(project=self.project)
+        # different project series
+        self.series_x = utils.create_series()
+
+    def test_add_superseded_series(self):
+        self.series_c.supersedes.set([self.series_b])
+
+        self.assertIn(self.series_b, self.series_c.supersedes.all())
+        self.assertIn(self.series_c, self.series_b.superseded.all())
+
+        self.series_b.supersedes.set([self.series_a])
+
+        self.assertIn(self.series_a, self.series_b.supersedes.all())
+        self.assertIn(self.series_b, self.series_a.superseded.all())