diff --git a/CHANGES.md b/CHANGES.md
index 64f30fa86..55f8680dc 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,6 +1,6 @@
 # Changelog
 
-# v 1.33
+# v 1.33 - 2017-12-07
 
 * Changes
   * Animate olcs.contrib.Manager#toggle3d.