diff --git a/CHANGELOG.md b/CHANGELOG.md
index dc817ee01..f462b21fc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,6 @@
 Change Log
 ---
-### 6.6.5 (2019-05-21)
+### 6.6.4 (2019-05-21)
 
 * Handle [breaking change](https://issuetracker.google.com/issues/133254108) in Google Tasks API