diff --git a/.hgtags b/.hgtags
index f3d8c5a06f..a0d2c7b3e3 100644
--- a/.hgtags
+++ b/.hgtags
@@ -24,3 +24,4 @@ f15899d4b83dde77b798c9bca34044bbb88f6ab7 5.4.0
 db3ae458c6a646c028d1220d948fa1de8cd89458 5.8.0
 dc5142b2be24b2b1d667969a1e0debd1762a5bbe 6.0.0
 a6ac57202e8618bff46d03c0145da25cc8a0d7e5 6.2.0
+3d7456c56484c1e8b161f9646e395220b827e364 6.4.0