diff --git a/.hgtags b/.hgtags
index a7def96d17..7697444a1d 100644
--- a/.hgtags
+++ b/.hgtags
@@ -1,2 +1,3 @@
 e2d7e4135cc43091843e096a227cb69ded3b425a 6.0.0
 e86dc3d9aaf74d02f4d76b7b39be6cccc45df90a 6.2.0
+e669817bef263fe9cfc7b9d065f2fd6464c33825 6.4.0