diff --git a/CHANGELOG.md b/CHANGELOG.md
index b4e34ed61ddda909a59dbbc80b5b05c7fa5ba930..1c17bcb16955bef021402290af06bd44677e9799 100644
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+++ b/CHANGELOG.md
@@ -1,7 +1,7 @@
 # Change Log
 All notable changes to this project will be documented in this file.
 
-## [4.0.0] September 2021 (Codename )
+## [4.0.0] September 2021 (Codename Heisenberg)
 
 - Adding DCPSE, Level-set based numerics (Closest-point)