diff --git a/.hgtags b/.hgtags
index 28f4c6dfc5..a24aa32023 100644
--- a/.hgtags
+++ b/.hgtags
@@ -15,3 +15,4 @@ ba40e64a897940f48ca268473c5cbea020012bc4 5.4.0
 abe9b52401d49510f6a3e43b9e534b01dc454c54 5.8.0
 102f59d4040423dc66a65f89639314a12fdc65a6 6.0.0
 21ba4f3c89b52a724850d6eda654541d427598dd 6.2.0
+2b312a0649144a08477e002e24fbbfa5ac7cd145 6.4.0