diff --git a/java/pom.xml b/java/pom.xml
index 70da6a6f..eb7930d5 100755
--- a/java/pom.xml
+++ b/java/pom.xml
@@ -3,7 +3,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>org.msgpack</groupId>
   <artifactId>msgpack</artifactId>
-  <version>0.3</version>
+  <version>0.4</version>
   <description>MessagePack for Java</description>
 
   <name>MessagePack for Java</name>