diff --git a/.hgtags b/.hgtags
index dc46768d03..1809d53c02 100644
--- a/.hgtags
+++ b/.hgtags
@@ -6,3 +6,4 @@ ddf4cfa5af01e368d995885606d572d53d36cd7b 3.0.0
 808383c0929c8dda2fab252418dbf31b46c2dffc 3.4.0
 bf11ecaa1d599160a62a02f46639955aaaa472a3 3.6.0
 07c3ef01edffc285a49cb969e18737dfac67bfdc 3.8.0
+d41ca7fbc924d4f73aff1c8377d2f700abe06f2d 4.0.0