diff --git a/.hgtags b/.hgtags
index ee7350d587..3616160d6b 100644
--- a/.hgtags
+++ b/.hgtags
@@ -11,3 +11,4 @@ ecb969fd8ac9420c348d8ec495085659a384ecf5 3.2.0
 ef61c5c3c8d21d018a27de0ef4b5695cc58e1de5 3.4.0
 a9ab25db0e9574b4b95f3fb53f82ea28be881228 3.6.0
 bbb478b01b853f92b4c6e7d69855a96a28cd75ce 3.8.0
+0a23227855067e5fad3d5713708048f7387fad89 4.0.0