diff --git a/.hgtags b/.hgtags
index d4aa2c5ee4..451de6e58d 100644
--- a/.hgtags
+++ b/.hgtags
@@ -14,3 +14,4 @@ cf6e16a08d6472db0fc1258be2de671e6fb78a1a 5.6.0
 fa28f9d63db532ed1c3d6744c2fda02af14f051d 5.8.0
 dba1c719c40465b4934a5cd7b52110017043354b 6.0.0
 693851ea10f7799664253451cfc95bc63453ed12 6.2.0
+3b5234c981ffcd6fe9f711727531736623571e39 6.4.0