diff --git a/.hgtags b/.hgtags
index 1e3b614495..19582169cb 100644
--- a/.hgtags
+++ b/.hgtags
@@ -8,3 +8,4 @@ bd304a295c3400cdd1d3ab88057cf52e3636d8b1 5.0.0
 66b2d8e545d2d1ec95b982d0ae82ac05e2f107d7 5.8.0
 ed3a20a42ba3e8d04ddd3c09d221227332e93f17 6.0.0
 359c8694c3744d86b179574570b4d9e697dbf483 6.2.0
+8b0ae661347fa34600a8487c407202bb4b6902a9 6.4.0