diff --git a/HISTORY.txt b/HISTORY.txt
index b25bb917..ec75f43f 100644
--- a/HISTORY.txt
+++ b/HISTORY.txt
@@ -1,3 +1,5 @@
+11.6.4:
+ - Fix a bug.
 11.6.3:
  - Depend on certifi.
 11.6.2: