diff --git a/.hgtags b/.hgtags
index 0b4aa96..18e84b1 100644
--- a/.hgtags
+++ b/.hgtags
@@ -13,3 +13,4 @@ c17653ce8b54de97d9a1a89ff9fe8604a7901ceb 3.0.2
 d720da04d44ae6ed4a9d548717f453a0fbaa9e56 3.0.4
 90a0844d7098ae1b06429ae6f931e21f8af6d48f before_merge_changesAfter3_0_2
 1d5059b8308b3960ddf750883fa0ed482ca11c34 3.1.0
+4ef1b1dbbb6104c24960bff5c650f702e4b494dc 4.0.0