diff --git a/README.md b/README.md
index c823d44..1a03777 100644
--- a/README.md
+++ b/README.md
@@ -15,7 +15,7 @@ TypeAlias for Java
 <dependency>
     <groupId>net.kemitix</groupId>
     <artifactId>mon</artifactId>
-    <version>0.3.0</version>
+    <version>0.4.0</version>
 </dependency>
 ```
 
diff --git a/pom.xml b/pom.xml
index 12c8406..ccf634f 100644
--- a/pom.xml
+++ b/pom.xml
@@ -10,7 +10,7 @@
         <version>3.2.4</version>
     </parent>
     <artifactId>mon</artifactId>
-    <version>0.4.0-SNAPSHOT</version>
+    <version>0.4.0</version>
 
     <properties>
         <junit.version>4.12</junit.version>