diff --git a/modules/swagger-core/src/main/java/io/swagger/v3/core/filter/SpecFilter.java b/modules/swagger-core/src/main/java/io/swagger/v3/core/filter/SpecFilter.java
index f930ff9a64..7d2f00a211 100755
--- a/modules/swagger-core/src/main/java/io/swagger/v3/core/filter/SpecFilter.java
+++ b/modules/swagger-core/src/main/java/io/swagger/v3/core/filter/SpecFilter.java
@@ -12,7 +12,6 @@
 import io.swagger.v3.oas.models.callbacks.Callback;
 import io.swagger.v3.oas.models.headers.Header;
 import io.swagger.v3.oas.models.media.ArraySchema;
-import io.swagger.v3.oas.models.media.ComposedSchema;
 import io.swagger.v3.oas.models.media.Content;
 import io.swagger.v3.oas.models.media.MediaType;
 import io.swagger.v3.oas.models.media.Schema;
@@ -310,20 +309,23 @@ private void addSchemaRef(Schema schema, Set<String> referencedDefinitions) {
             addSchemaRef(((ArraySchema) schema).getItems(), referencedDefinitions);
         } else if (schema.getTypes() != null && schema.getTypes().contains("array") && schema.getItems() != null) {
             addSchemaRef(schema.getItems(), referencedDefinitions);
-        } else if (schema instanceof ComposedSchema) {
-            ComposedSchema composedSchema = (ComposedSchema) schema;
-            if (composedSchema.getAllOf() != null) {
-                for (Schema ref : composedSchema.getAllOf()) {
+        } else {
+            List<Schema> allOf = schema.getAllOf();
+            List<Schema> anyOf = schema.getAnyOf();
+            List<Schema> oneOf = schema.getOneOf();
+
+            if (allOf != null) {
+                for (Schema ref : allOf) {
                     addSchemaRef(ref, referencedDefinitions);
                 }
             }
-            if (composedSchema.getAnyOf() != null) {
-                for (Schema ref : composedSchema.getAnyOf()) {
+            if (anyOf != null) {
+                for (Schema ref : anyOf) {
                     addSchemaRef(ref, referencedDefinitions);
                 }
             }
-            if (composedSchema.getOneOf() != null) {
-                for (Schema ref : composedSchema.getOneOf()) {
+            if (oneOf != null) {
+                for (Schema ref : oneOf) {
                     addSchemaRef(ref, referencedDefinitions);
                 }
             }
diff --git a/modules/swagger-core/src/test/java/io/swagger/v3/core/filter/SpecFilterTest.java b/modules/swagger-core/src/test/java/io/swagger/v3/core/filter/SpecFilterTest.java
index 9ffb7c687e..f04c9b56e7 100644
--- a/modules/swagger-core/src/test/java/io/swagger/v3/core/filter/SpecFilterTest.java
+++ b/modules/swagger-core/src/test/java/io/swagger/v3/core/filter/SpecFilterTest.java
@@ -47,6 +47,7 @@ public class SpecFilterTest {
     private static final String RESOURCE_PATH = "specFiles/petstore-3.0-v2.json";
     private static final String RESOURCE_PATH_3303 = "specFiles/petstore-3.0-v2-ticket-3303.json";
     private static final String RESOURCE_PATH_LIST = "specFiles/3.1.0/list-3.1.json";
+    private static final String RESOURCE_PATH_COMPOSED_SCHEMA = "specFiles/3.1.0/composed-schema-3.1.json";
     private static final String RESOURCE_REFERRED_SCHEMAS = "specFiles/petstore-3.0-referred-schemas.json";
     private static final String RESOURCE_PATH_WITHOUT_MODELS = "specFiles/petstore-3.0-v2_withoutModels.json";
     private static final String RESOURCE_DEPRECATED_OPERATIONS = "specFiles/deprecatedoperationmodel.json";
@@ -286,6 +287,18 @@ public void shouldRemoveBrokenNestedRefsKeepArray() throws IOException {
         assertTrue(filtered.getComponents().getSchemas().containsKey("SomeChildObject"), "Schemas should contains child list");
     }
 
+    @Test
+    public void shouldRemoveBrokenNestedRefsKeepComposedSchemas() throws IOException {
+        final OpenAPI openAPI = getOpenAPI31(RESOURCE_PATH_COMPOSED_SCHEMA);
+        final RemoveUnreferencedDefinitionsFilter remover = new RemoveUnreferencedDefinitionsFilter();
+        final OpenAPI filtered = new SpecFilter().filter(openAPI, remover, null, null, null);
+
+        assertEquals(filtered.getComponents().getSchemas().size(), 4, "Expected to have parent and abstract child with both implementations schemas");
+        assertTrue(filtered.getComponents().getSchemas().containsKey("SomeChild1ImplObject"), "Schemas should contains child 1 implementation");
+        assertTrue(filtered.getComponents().getSchemas().containsKey("SomeChild2ImplObject"), "Schemas should contains child 2 implementation");
+        assertTrue(filtered.getComponents().getSchemas().containsKey("SomeChildObject"), "Schemas should contains child abstract parent");
+    }
+
     @Test
     public void shouldNotRemoveGoodRefs() throws IOException {
         final OpenAPI openAPI = getOpenAPI(RESOURCE_PATH);
diff --git a/modules/swagger-core/src/test/resources/specFiles/3.1.0/composed-schema-3.1.json b/modules/swagger-core/src/test/resources/specFiles/3.1.0/composed-schema-3.1.json
new file mode 100644
index 0000000000..3fbe926a7e
--- /dev/null
+++ b/modules/swagger-core/src/test/resources/specFiles/3.1.0/composed-schema-3.1.json
@@ -0,0 +1,85 @@
+{
+  "components": {
+    "schemas": {
+      "SomeChild1ImplObject": {
+        "allOf": [
+          {
+            "$ref": "#/components/schemas/SomeChildObject"
+          }
+        ]
+      },
+      "SomeChild2ImplObject": {
+        "allOf": [
+          {
+            "$ref": "#/components/schemas/SomeChildObject"
+          }
+        ]
+      },
+      "SomeChildObject": {
+        "description": "Some child object"
+      },
+      "SomeParentObject": {
+        "description": "Some parent object",
+        "properties": {
+          "id": {
+            "description": "id",
+            "format": "int64",
+            "type": "integer"
+          },
+          "other": {
+            "description": "other",
+            "oneOf": [
+              {
+                "$ref": "#/components/schemas/SomeChild1ImplObject"
+              },
+              {
+                "$ref": "#/components/schemas/SomeChild2ImplObject"
+              }
+            ]
+          }
+        }
+      }
+    }
+  },
+  "info": {
+    "title": "OpenAPI definition",
+    "version": "v0"
+  },
+  "openapi": "3.1.0",
+  "paths": {
+    "/some/call": {
+      "get": {
+        "description": "Some operation description",
+        "operationId": "getSome",
+        "responses": {
+          "200": {
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/SomeParentObject"
+                }
+              }
+            },
+            "description": "OK"
+          }
+        },
+        "summary": "Some summary",
+        "tags": [
+          "Some"
+        ]
+      }
+    }
+  },
+  "servers": [
+    {
+      "description": "Generated server url",
+      "url": "http://localhost:8080"
+    }
+  ],
+  "tags": [
+    {
+      "description": "some actions",
+      "name": "Some"
+    }
+  ]
+}
\ No newline at end of file