diff --git a/CHANGELOG.md b/CHANGELOG.md
index c8cc610e..3994bec7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,8 @@ 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]
+
 ## [4.31.0] - 2023-04-22
 ### `jsonschema-generator`
 #### Added
@@ -748,6 +750,7 @@ 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/v4.31.0...HEAD
 [4.31.0]: https://github.com/victools/jsonschema-generator/compare/v4.30.0...v4.31.0
 [4.30.0]: https://github.com/victools/jsonschema-generator/compare/v4.29.0...v4.30.0
 [4.29.0]: https://github.com/victools/jsonschema-generator/compare/v4.28.0...v4.29.0
diff --git a/jsonschema-examples/pom.xml b/jsonschema-examples/pom.xml
index 966692a0..ba926664 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>4.31.0</version>
+        <version>4.31.1-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 199ea9da..c8fc8861 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>4.31.0</version>
+    <version>4.31.1-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>v4.31.0</tag>
+        <tag>HEAD</tag>
     </scm>
 
     <organization>
diff --git a/jsonschema-generator-parent/pom.xml b/jsonschema-generator-parent/pom.xml
index 8cb0ff08..2b56abda 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>4.31.0</version>
+        <version>4.31.1-SNAPSHOT</version>
         <relativePath>../jsonschema-generator-bom/pom.xml</relativePath>
     </parent>
     <artifactId>jsonschema-generator-parent</artifactId>
diff --git a/jsonschema-generator/pom.xml b/jsonschema-generator/pom.xml
index f676c03c..a3c6daf2 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>4.31.0</version>
+        <version>4.31.1-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 a11b56e8..02cad512 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>4.31.0</version>
+        <version>4.31.1-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 78f10160..4e6cf7b5 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>4.31.0</version>
+        <version>4.31.1-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 ea0778f2..7230f0da 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>4.31.0</version>
+        <version>4.31.1-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 d5bb44d5..21c31d2d 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>4.31.0</version>
+        <version>4.31.1-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 1b368e64..87ae57f9 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>4.31.0</version>
+        <version>4.31.1-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 d6360c72..205205d0 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>4.31.0</version>
+        <version>4.31.1-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 7dcc43dd..77df4134 100644
--- a/pom.xml
+++ b/pom.xml
@@ -3,7 +3,7 @@
 
     <groupId>com.github.victools</groupId>
     <artifactId>jsonschema-generator-reactor</artifactId>
-    <version>4.31.0</version>
+    <version>4.31.1-SNAPSHOT</version>
     <packaging>pom</packaging>
 
     <name>Java JSON Schema Generator (Reactor)</name>