diff --git a/build-tools/pom.xml b/build-tools/pom.xml
index ba82456142..51679c33c1 100644
--- a/build-tools/pom.xml
+++ b/build-tools/pom.xml
@@ -2,7 +2,7 @@
     <modelVersion>4.0.0</modelVersion>
     <groupId>org.locationtech.jts</groupId>
     <artifactId>build-tools</artifactId>
-    <version>1.20.0</version>
+    <version>1.20.1-SNAPSHOT</version>
     <name>JTS Topology Suite Build Configuration</name>
     
     <build>
diff --git a/doc/JTS_Version_History.md b/doc/JTS_Version_History.md
index 2276f09a3b..1b3e4bf8a3 100644
--- a/doc/JTS_Version_History.md
+++ b/doc/JTS_Version_History.md
@@ -17,11 +17,9 @@ Distributions for older JTS versions can be obtained at the
 
 <!-- ================================================================ -->
 
-Version 1.x
+# Version 1.20.1
 
-Release Date: TBD
-
-# Version 1.x
+*Release Date: TBD**
 
 ### New Features
 
diff --git a/modules/app/pom.xml b/modules/app/pom.xml
index e25145a9e9..6aced9e913 100644
--- a/modules/app/pom.xml
+++ b/modules/app/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <groupId>org.locationtech.jts</groupId>
         <artifactId>jts-modules</artifactId>
-        <version>1.20.0</version>
+        <version>1.20.1-SNAPSHOT</version>
     </parent>
     <artifactId>jts-app</artifactId>
     <name>${project.groupId}:${project.artifactId}</name>
diff --git a/modules/core/pom.xml b/modules/core/pom.xml
index 4b5a72589b..48ed06fecc 100644
--- a/modules/core/pom.xml
+++ b/modules/core/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <groupId>org.locationtech.jts</groupId>
         <artifactId>jts-modules</artifactId>
-        <version>1.20.0</version>
+        <version>1.20.1-SNAPSHOT</version>
     </parent>
     <artifactId>jts-core</artifactId>
     <name>${project.groupId}:${project.artifactId}</name>
diff --git a/modules/core/src/main/java/org/locationtech/jts/JTSVersion.java b/modules/core/src/main/java/org/locationtech/jts/JTSVersion.java
index 45da12823f..e73133035f 100644
--- a/modules/core/src/main/java/org/locationtech/jts/JTSVersion.java
+++ b/modules/core/src/main/java/org/locationtech/jts/JTSVersion.java
@@ -41,12 +41,12 @@ public class JTSVersion {
   /**
    * The patch version number.
    */
-  public static final int PATCH = 0;
+  public static final int PATCH = 1;
 
   /**
    * An optional string providing further release info (such as "alpha 1");
    */
-  private static final String RELEASE_INFO = "";
+  private static final String RELEASE_INFO = "SNAPSHOT";
 
   /**
    * Prints the current JTS version to stdout.
diff --git a/modules/example/pom.xml b/modules/example/pom.xml
index 5dede0e79f..09de85502d 100644
--- a/modules/example/pom.xml
+++ b/modules/example/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <groupId>org.locationtech.jts</groupId>
         <artifactId>jts-modules</artifactId>
-        <version>1.20.0</version>
+        <version>1.20.1-SNAPSHOT</version>
     </parent>
     <artifactId>jts-example</artifactId>
     <name>${project.groupId}:${project.artifactId}</name>
diff --git a/modules/io/common/pom.xml b/modules/io/common/pom.xml
index 5ea29f37e7..7220ec14cb 100644
--- a/modules/io/common/pom.xml
+++ b/modules/io/common/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <groupId>org.locationtech.jts</groupId>
         <artifactId>jts-io</artifactId>
-        <version>1.20.0</version>
+        <version>1.20.1-SNAPSHOT</version>
     </parent>
     <groupId>org.locationtech.jts.io</groupId>
     <artifactId>jts-io-common</artifactId>
diff --git a/modules/io/ora/pom.xml b/modules/io/ora/pom.xml
index 0c92dd48c7..136afb71f1 100644
--- a/modules/io/ora/pom.xml
+++ b/modules/io/ora/pom.xml
@@ -4,7 +4,7 @@
     <parent>
         <groupId>org.locationtech.jts</groupId>
         <artifactId>jts-io</artifactId>
-        <version>1.20.0</version>
+        <version>1.20.1-SNAPSHOT</version>
     </parent>
     <groupId>org.locationtech.jts.io</groupId>
     <artifactId>jts-io-ora</artifactId>
diff --git a/modules/io/pom.xml b/modules/io/pom.xml
index 7b6cbb13ec..9f0478c133 100644
--- a/modules/io/pom.xml
+++ b/modules/io/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <groupId>org.locationtech.jts</groupId>
         <artifactId>jts-modules</artifactId>
-        <version>1.20.0</version>
+        <version>1.20.1-SNAPSHOT</version>
     </parent>
     <artifactId>jts-io</artifactId>
     <name>${project.groupId}:${project.artifactId}</name>
diff --git a/modules/lab/pom.xml b/modules/lab/pom.xml
index e5d1ae11ec..ec9bad4e9c 100644
--- a/modules/lab/pom.xml
+++ b/modules/lab/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <groupId>org.locationtech.jts</groupId>
         <artifactId>jts-modules</artifactId>
-        <version>1.20.0</version>
+        <version>1.20.1-SNAPSHOT</version>
     </parent>
     <artifactId>jts-lab</artifactId>
     <name>${project.groupId}:${project.artifactId}</name>
diff --git a/modules/pom.xml b/modules/pom.xml
index 4a948e776f..1c49ffa427 100644
--- a/modules/pom.xml
+++ b/modules/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <groupId>org.locationtech.jts</groupId>
         <artifactId>jts</artifactId>
-        <version>1.20.0</version>
+        <version>1.20.1-SNAPSHOT</version>
     </parent>
     <artifactId>jts-modules</artifactId>
     <name>${project.groupId}:${project.artifactId}</name>
diff --git a/modules/tests/pom.xml b/modules/tests/pom.xml
index 15a33b70d5..8280d2c96a 100644
--- a/modules/tests/pom.xml
+++ b/modules/tests/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <groupId>org.locationtech.jts</groupId>
         <artifactId>jts-modules</artifactId>
-        <version>1.20.0</version>
+        <version>1.20.1-SNAPSHOT</version>
     </parent>
     <artifactId>jts-tests</artifactId>
     <name>${project.groupId}:${project.artifactId}</name>
diff --git a/pom.xml b/pom.xml
index 7589896f06..002f2c54c8 100644
--- a/pom.xml
+++ b/pom.xml
@@ -3,7 +3,7 @@
     <modelVersion>4.0.0</modelVersion>
     <groupId>org.locationtech.jts</groupId>
     <artifactId>jts</artifactId>
-    <version>1.20.0</version>
+    <version>1.20.1-SNAPSHOT</version>
     <packaging>pom</packaging>
 
     <name>JTS Topology Suite</name>