diff --git a/CHANGELOG.md b/CHANGELOG.md
index 835e1c36..d582b556 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,11 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [Unreleased]
+### `jsonschema-generator`
+#### Changed
+- avoid duplicate entries in `required` array when performing final clean-ups
+
 ## [4.37.0] - 2024-11-11
 ### `jsonschema-generator`
 #### Added
@@ -859,6 +864,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Indicate a number's "exclusiveMaximum" according to `@DecimalMax` or `@Negative`
 
 
+[Unreleased]: https://github.com/victools/jsonschema-generator/compare/v4.37.0...HEAD
 [4.37.0]: https://github.com/victools/jsonschema-generator/compare/v4.36.0...v4.37.0
 [4.36.0]: https://github.com/victools/jsonschema-generator/compare/v4.35.0...v4.36.0
 [4.35.0]: https://github.com/victools/jsonschema-generator/compare/v4.34.0...v4.35.0
diff --git a/jsonschema-examples/pom.xml b/jsonschema-examples/pom.xml
index b373be99..5c90db5f 100644
--- a/jsonschema-examples/pom.xml
+++ b/jsonschema-examples/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <groupId>com.github.victools</groupId>
         <artifactId>jsonschema-generator-parent</artifactId>
-        <version>4.37.0</version>
+        <version>4.38.0-SNAPSHOT</version>
         <relativePath>../jsonschema-generator-parent/pom.xml</relativePath>
     </parent>
     <artifactId>jsonschema-examples</artifactId>
diff --git a/jsonschema-generator-bom/pom.xml b/jsonschema-generator-bom/pom.xml
index 65905e99..d8fcc05f 100644
--- a/jsonschema-generator-bom/pom.xml
+++ b/jsonschema-generator-bom/pom.xml
@@ -8,7 +8,7 @@
 
     <groupId>com.github.victools</groupId>
     <artifactId>jsonschema-generator-bom</artifactId>
-    <version>4.37.0</version>
+    <version>4.38.0-SNAPSHOT</version>
     <packaging>pom</packaging>
 
     <properties>
@@ -26,7 +26,7 @@
         <connection>scm:git:https://github.com/victools/jsonschema-generator.git</connection>
         <developerConnection>scm:git:https://github.com/victools/jsonschema-generator.git</developerConnection>
         <url>https://github.com/victools/jsonschema-generator</url>
-        <tag>v4.37.0</tag>
+        <tag>HEAD</tag>
     </scm>
 
     <organization>
diff --git a/jsonschema-generator-parent/pom.xml b/jsonschema-generator-parent/pom.xml
index 7840f631..dda23f61 100644
--- a/jsonschema-generator-parent/pom.xml
+++ b/jsonschema-generator-parent/pom.xml
@@ -4,7 +4,7 @@
     <parent>
         <groupId>com.github.victools</groupId>
         <artifactId>jsonschema-generator-bom</artifactId>
-        <version>4.37.0</version>
+        <version>4.38.0-SNAPSHOT</version>
         <relativePath>../jsonschema-generator-bom/pom.xml</relativePath>
     </parent>
     <artifactId>jsonschema-generator-parent</artifactId>
@@ -61,6 +61,7 @@
                 <role>Provided PRs #116 and #118 (part of initial Swagger2Module)</role>
                 <role>Provided implementation for #204 (readOnly/writeOnly in JacksonModule)</role>
                 <role>Provided PR #299 and feedback on final implementation (inheritance of validation constraint annotations)</role>
+                <role>Provided implementation for PR #503 (avoid duplicates in required array during final clean-ups)</role>
             </roles>
         </contributor>
         <contributor>
diff --git a/jsonschema-generator/pom.xml b/jsonschema-generator/pom.xml
index 1b4a6130..b4b34f8d 100644
--- a/jsonschema-generator/pom.xml
+++ b/jsonschema-generator/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <groupId>com.github.victools</groupId>
         <artifactId>jsonschema-generator-parent</artifactId>
-        <version>4.37.0</version>
+        <version>4.38.0-SNAPSHOT</version>
         <relativePath>../jsonschema-generator-parent/pom.xml</relativePath>
     </parent>
     <artifactId>jsonschema-generator</artifactId>
diff --git a/jsonschema-maven-plugin/pom.xml b/jsonschema-maven-plugin/pom.xml
index a34f0890..7f2517c9 100644
--- a/jsonschema-maven-plugin/pom.xml
+++ b/jsonschema-maven-plugin/pom.xml
@@ -6,7 +6,7 @@
     <parent>
         <groupId>com.github.victools</groupId>
         <artifactId>jsonschema-generator-parent</artifactId>
-        <version>4.37.0</version>
+        <version>4.38.0-SNAPSHOT</version>
         <relativePath>../jsonschema-generator-parent/pom.xml</relativePath>
     </parent>
     <artifactId>jsonschema-maven-plugin</artifactId>
diff --git a/jsonschema-module-jackson/pom.xml b/jsonschema-module-jackson/pom.xml
index e3d25b67..1e02c8df 100644
--- a/jsonschema-module-jackson/pom.xml
+++ b/jsonschema-module-jackson/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <groupId>com.github.victools</groupId>
         <artifactId>jsonschema-generator-parent</artifactId>
-        <version>4.37.0</version>
+        <version>4.38.0-SNAPSHOT</version>
         <relativePath>../jsonschema-generator-parent/pom.xml</relativePath>
     </parent>
     <artifactId>jsonschema-module-jackson</artifactId>
diff --git a/jsonschema-module-jakarta-validation/pom.xml b/jsonschema-module-jakarta-validation/pom.xml
index bd714b70..c041930e 100644
--- a/jsonschema-module-jakarta-validation/pom.xml
+++ b/jsonschema-module-jakarta-validation/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <groupId>com.github.victools</groupId>
         <artifactId>jsonschema-generator-parent</artifactId>
-        <version>4.37.0</version>
+        <version>4.38.0-SNAPSHOT</version>
         <relativePath>../jsonschema-generator-parent/pom.xml</relativePath>
     </parent>
     <artifactId>jsonschema-module-jakarta-validation</artifactId>
diff --git a/jsonschema-module-javax-validation/pom.xml b/jsonschema-module-javax-validation/pom.xml
index f588d90d..46959df5 100644
--- a/jsonschema-module-javax-validation/pom.xml
+++ b/jsonschema-module-javax-validation/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <groupId>com.github.victools</groupId>
         <artifactId>jsonschema-generator-parent</artifactId>
-        <version>4.37.0</version>
+        <version>4.38.0-SNAPSHOT</version>
         <relativePath>../jsonschema-generator-parent/pom.xml</relativePath>
     </parent>
     <artifactId>jsonschema-module-javax-validation</artifactId>
diff --git a/jsonschema-module-swagger-1.5/pom.xml b/jsonschema-module-swagger-1.5/pom.xml
index cd19b61e..6dab80aa 100644
--- a/jsonschema-module-swagger-1.5/pom.xml
+++ b/jsonschema-module-swagger-1.5/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <groupId>com.github.victools</groupId>
         <artifactId>jsonschema-generator-parent</artifactId>
-        <version>4.37.0</version>
+        <version>4.38.0-SNAPSHOT</version>
         <relativePath>../jsonschema-generator-parent/pom.xml</relativePath>
     </parent>
     <artifactId>jsonschema-module-swagger-1.5</artifactId>
diff --git a/jsonschema-module-swagger-2/pom.xml b/jsonschema-module-swagger-2/pom.xml
index d2086e2f..1ffca530 100644
--- a/jsonschema-module-swagger-2/pom.xml
+++ b/jsonschema-module-swagger-2/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <groupId>com.github.victools</groupId>
         <artifactId>jsonschema-generator-parent</artifactId>
-        <version>4.37.0</version>
+        <version>4.38.0-SNAPSHOT</version>
         <relativePath>../jsonschema-generator-parent/pom.xml</relativePath>
     </parent>
     <artifactId>jsonschema-module-swagger-2</artifactId>
diff --git a/pom.xml b/pom.xml
index 0eae7269..719964fc 100644
--- a/pom.xml
+++ b/pom.xml
@@ -3,7 +3,7 @@
 
     <groupId>com.github.victools</groupId>
     <artifactId>jsonschema-generator-reactor</artifactId>
-    <version>4.37.0</version>
+    <version>4.38.0-SNAPSHOT</version>
     <packaging>pom</packaging>
 
     <name>Java JSON Schema Generator (Reactor)</name>