diff --git a/.hgtags b/.hgtags
index b9039bbec7..fa16751c1f 100644
--- a/.hgtags
+++ b/.hgtags
@@ -1,3 +1,4 @@
 0a5ab9e8e526e89b69c1aadb73127da0759edc27 5.8.0
 4b01e563d74ede2cd6ac3c0ae8bd597a963c21a3 6.0.0
 4aec6b591d561476f821e4b7696fdeb2445649a0 6.2.0
+13fb09e13f9961147b3fafd7a4acda34aa782057 6.4.0