diff --git a/.hgtags b/.hgtags
index 56fe3fd2c1..333fbdea1d 100644
--- a/.hgtags
+++ b/.hgtags
@@ -11,3 +11,4 @@ f24f3bd3dcb18da6778d18215204ebc3b1466f04 3.0.0
 2801b74d1f449337ae16d534cd0ae0baf449ca13 3.4.0
 3574b7c3ed4b5e0c0efc1a03a10c01d22b0b931b 3.6.0
 19a676437ceea107434da68acbae9a236fb411fd 3.8.0
+939bc69d8f152241d27b2fe9417ce138b6f0d427 4.0.0