diff --git a/.hgtags b/.hgtags
index 887b996c38..b43f776b7d 100644
--- a/.hgtags
+++ b/.hgtags
@@ -9,3 +9,4 @@ e9c1c8ee8d12182e14e0b7fda103035e43d957ef 5.6.0
 879357ee52cac15348178e8cba439074c7fcc206 5.8.0
 ba57075f760026b8388fb77bd0cc053601bd04b0 6.0.0
 6216cdc125f78a1071e72bb49cc7fcdff2b82667 6.2.0
+053fff25d83a0378a37b43591d864becdb8dd217 6.4.0