diff --git a/.hgtags b/.hgtags
index 0d93bd368a..e2ba24f2d4 100644
--- a/.hgtags
+++ b/.hgtags
@@ -13,3 +13,4 @@ c8f1e04d586d15592f29ec8fa8d80ae2c55422ae 2.8.0
 fb58019b42f7f9db5e0a0f771836dc1b81af1300 3.4.0
 a8e7c5a26a05f775987a02634eeb9063bb9f5464 3.6.0
 49ccff155aa269e38cbca8fd6c05d31cb204bd34 3.8.0
+1beea2175bf4bf3f81af88335c620f9a5d713422 4.0.0