diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3adc9d2df..1510e936c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,7 +1,7 @@
 # Change Log
 
-## [3.7.0](https://github.com/zammad/zammad/tree/3.7.0) (2021-xx-xx)
-[Full Changelog](https://github.com/zammad/zammad/compare/3.6.0...3.7.0)
+## [4.0.0](https://github.com/zammad/zammad/tree/4.0.0) (2021-xx-xx)
+[Full Changelog](https://github.com/zammad/zammad/compare/3.6.0...4.0.0)
 
 **Implemented enhancements:**
 
diff --git a/VERSION b/VERSION
index e50b7eb7f..3be724a32 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-3.7.x
+4.0.x