diff --git a/.hgtags b/.hgtags
index 02c20b6588..8354ef0942 100644
--- a/.hgtags
+++ b/.hgtags
@@ -24,3 +24,4 @@ ec2b60415d119b35cf61b75247abaf5bb67a70b1 4.8.0
 119bb6dcafeffabbe80a5b9fcb872071e0f3c784 5.8.0
 1a8e026150a29d49f552c112f9795b1f2ad035b6 6.0.0
 613034b9778b85d02ae1585a39e90039f13a3695 6.2.0
+47541d334066316ea3296e4eb2004da55c6b5e4f 6.4.0