diff --git a/.hgtags b/.hgtags
index 9efba1553f..02eac9d9df 100644
--- a/.hgtags
+++ b/.hgtags
@@ -8,3 +8,4 @@ f5566992ba13457c904bb6049a4c47be18967c0e 3.2.0
 d205be565ce0b6e59cb0515277f0eb69413ce62b 3.4.0
 f3359db82851d945df8bf63b3639773610d8f718 3.6.0
 74762f17d02240e3068e6e6a59ec99ff5a278b84 3.8.0
+e28ead62d6de9e8d23bf21e4af0612ee1d9e2149 4.0.0