diff --git a/java/gradle.properties b/java/gradle.properties
index 3fc5077..39564b3 100644
--- a/java/gradle.properties
+++ b/java/gradle.properties
@@ -1,2 +1,2 @@
 group=io.github.ngyewch.twirp
-version=0.3.0
+version=0.4.0