diff --git a/.hgtags b/.hgtags
index 7e03339534..331efbac50 100644
--- a/.hgtags
+++ b/.hgtags
@@ -3,3 +3,4 @@ a5a633f047a3ac0df684f6ce4980c18175c3d0e5 3.2.0
 d6fe7ad98f68d11178f761d310683c7def41301c 3.4.0
 12575253471557853ad27f1a6c6792e587d74654 3.6.0
 9b976110957cd3f86884583bec9d8b8a4b47bf1b 3.8.0
+00e845437d4b6558f692a6a7f9fa6a70ffa3150a 4.0.0