diff --git a/.hgtags b/.hgtags
index cde68f94af..646635f536 100644
--- a/.hgtags
+++ b/.hgtags
@@ -4,3 +4,4 @@ ff56baf85214a350c451429d7b7e5c82f079dfbf 5.6.0
 9e7f7d7fba700723d553f4db0ae444ce1d5df561 5.8.0
 541b72abe187e80ae8d546d957d3c31cdfc096b6 6.0.0
 87a8e2696b48cc51872dfba87ee647bc4a1e1ef4 6.2.0
+412aff52e0f07ece84c0bf1fe4f514c91fbcbb50 6.4.0