diff --git a/package.json b/package.json
index 33a2a4182..e5d012c1a 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "@effekt-lang/effekt",
   "author": "Jonathan Brachthäuser",
-  "version": "0.3.0",
+  "version": "0.4.0",
   "repository": {
     "type": "git",
     "url": "git+https://github.com/effekt-lang/effekt.git"
diff --git a/pom.xml b/pom.xml
index ab887bdd9..ba0a56a04 100644
--- a/pom.xml
+++ b/pom.xml
@@ -7,7 +7,7 @@
  <groupId>de.bstudios</groupId>
  <artifactId>Effekt</artifactId>
  <name>Effekt</name>
- <version>0.3.0</version>
+ <version>0.4.0</version>
  <modelVersion>4.0.0</modelVersion>
 
    <dependencies>
diff --git a/project/EffektVersion.scala b/project/EffektVersion.scala
index cdc01c0cc..33ae20f62 100644
--- a/project/EffektVersion.scala
+++ b/project/EffektVersion.scala
@@ -1,4 +1,4 @@
 // Don't change this file without changing the CI too!
 import sbt.*
 import sbt.Keys.*
-object EffektVersion { lazy val effektVersion = "0.3.0" }
+object EffektVersion { lazy val effektVersion = "0.4.0" }