diff --git a/.hgtags b/.hgtags
index 8a27298b96..ea3a7b76d5 100644
--- a/.hgtags
+++ b/.hgtags
@@ -1,3 +1,4 @@
 480d0a013cec600246dbee9283b5d0fb9a2c8736 5.8.0
 f67943f30b461c6574d3cb9b176a01bcb9094af9 6.0.0
 be1ba7b334990bb5751e843f34f5fffe1b704423 6.2.0
+cc1d73af08d9c8711b4f264984638ca666b82fe9 6.4.0