diff --git a/.hgtags b/.hgtags
index 679259f31a..eb17fefca3 100644
--- a/.hgtags
+++ b/.hgtags
@@ -11,3 +11,4 @@ f8a3764421ee95566a8a096ff19de32fe971da2f 2.4.0
 3df95645e34e5bcc23da8aa48c8e6d349e6b28f4 3.4.0
 ef0c05005b1c3d35bbc4ed9501d62b233cfefb66 3.6.0
 0e32a58f31e46fd31f8cd338e7c5f2c93ecf86f3 3.8.0
+7ffc47bc807c6f8fa474bf4a83217aef79a260b5 4.0.0