diff --git a/.hgtags b/.hgtags
index ecd3d0dee1..b17113f148 100644
--- a/.hgtags
+++ b/.hgtags
@@ -4,3 +4,4 @@ c9c7d52d75b72ccf9c033ff79d5f1d0b679fee54 5.4.0
 d61314f92fda9b8e1d7c6830df3a1d0bba50ec0b 5.8.0
 c272a650989e912033603aa997b56432fe034c86 6.0.0
 9cee2d6b6c6958e5c3bf3a07db1da65eb25300ee 6.2.0
+7c6a54decc814ac2c6b1b03bd80e0247b8407768 6.4.0