diff --git a/.hgtags b/.hgtags
index 54f5091dd6..dc7450be6e 100644
--- a/.hgtags
+++ b/.hgtags
@@ -4,3 +4,4 @@ e12412ef0fb31400c2efafd792129d80ffda588b 3.0.0
 bee432992665cc32e7097c52e33ca70b3cd45ba2 3.4.0
 fd6f3a11ee86f0d85b9f70b15cbb4a32a78ca4e1 3.6.0
 96f37b101c56103d432154d9ba7a5f128e7805fb 3.8.0
+3c80472e59527be16643d6fa72e1f0a6fabc32d1 4.0.0