diff --git a/ChangeLog b/ChangeLog
index b8027978..11f1df99 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,4 +1,4 @@
-Version 0.3.1+
+Version 0.4.0 2020-03-16
 	* Remove Methionine from N-terminus
 	* Fix for when no smORFs are present
 	* Add --keep-negatives flag
diff --git a/macrel/macrel_version.py b/macrel/macrel_version.py
index a60ab2f1..abeeedbf 100644
--- a/macrel/macrel_version.py
+++ b/macrel/macrel_version.py
@@ -1 +1 @@
-__version__ = '0.4-pre'
+__version__ = '0.4.0'