diff --git a/.hgtags b/.hgtags
index fa32787f53..2e7e63f92e 100644
--- a/.hgtags
+++ b/.hgtags
@@ -3,3 +3,4 @@
 037afc127047ce9a8558cb7f3c5778b8ff84eb60 5.8.0
 18ef01aa2e6feb211bbfc1a53449e227f369ffee 6.0.0
 d8dc0cfe490442a6efaab0dc888c1bf7e0d048a2 6.2.0
+0a4dd0908559298697c0be7494424775a9c707d7 6.4.0