diff --git a/gradle.properties b/gradle.properties
index ac109b94..d5706f5d 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,4 +1,4 @@
-version=0.3.1
+version=0.4.0-SNAPSHOT
 org.gradle.jvmargs=-Xmx3g -XX:+HeapDumpOnOutOfMemoryError
 org.gradle.parallel=true
 org.gradle.caching=true
diff --git a/oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/core/Version.java b/oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/core/Version.java
index 179a8ac7..1e243e92 100644
--- a/oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/core/Version.java
+++ b/oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/core/Version.java
@@ -23,8 +23,8 @@ package org.springframework.security.oauth2.core;
  */
 public final class Version {
 	private static final int MAJOR = 0;
-	private static final int MINOR = 3;
-	private static final int PATCH = 1;
+	private static final int MINOR = 4;
+	private static final int PATCH = 0;
 
 	/**
 	 * Global Serialization value for Spring Security Authorization Server classes.