diff --git a/.hgtags b/.hgtags
index d1d8bb62d8..5d31ad41fd 100644
--- a/.hgtags
+++ b/.hgtags
@@ -10,3 +10,4 @@ fac58ec726e0bb8c4dc9ea5f5d0f0a1fbaf8f94f 3.2.0
 bb0ed6867cabf05d58b5ef98eeb7a364939acdc1 3.4.0
 6ef578dc4f6da372f04cd1c0198a94bfd6f3eb62 3.6.0
 2f848da36791fc48112cd6c7c81a8708f5827431 3.8.0
+fd788ea3774d3eb2aca8480d8076d25513297d69 4.0.0