diff --git a/.hgtags b/.hgtags
--- a/.hgtags
+++ b/.hgtags
@@ -11,3 +11,4 @@ 1232313f9e6adac5ce5399c2a891dc1e72b79022
 cbb9f1d329ae5768379cdec55a62ebdd546c4e27 v4.4.1
 24ffe44a27fcd1c5b6936144e176b9f6dd2f3a17 v4.4.2
 beaeeaa440cd17471110d4621b8816506c0dff4a v4.5.0
+668e5c656f61dd94595611844e1106d1361aa6a7 v4.5.1