diff --git a/.hgtags b/.hgtags
index 8a3ceb2ad3..81c3d99402 100644
--- a/.hgtags
+++ b/.hgtags
@@ -24,3 +24,4 @@ a02f09f5837245a86c17ca480d069694b85d8214 5.6.0
 dfea61949c69f6013213cc92528fcfbc62e0a0f6 5.8.0
 25101e7ec2d7d8322005ae0e70f3d78256223ebe 6.0.0
 18a35510777ea296aff2bdc46fa4fc156fb6a2b6 6.2.0
+8f8e0041380e8a6dded2149eeb2f83993e98cb4f 6.4.0