diff --git a/.hgtags b/.hgtags
index d1f7adf933..607f8fd792 100644
--- a/.hgtags
+++ b/.hgtags
@@ -1,2 +1,3 @@
 c7417ae4ded2da0df4469fa4feacbd6cfb39d11b 6.0.0
 e3f4c5a08cfb78df359c4a26b6926eed93d29757 6.2.0
+ba9e9ace06e7ae5fe046eeb47d240509ee7199c3 6.4.0