diff --git a/.hgtags b/.hgtags
index 02fcac7ec5..967265a9fb 100644
--- a/.hgtags
+++ b/.hgtags
@@ -1 +1,2 @@
 f973a462aa6908f8a37fb2dff129c77975a8ea0b 3.8.0
+78d2168cfb1c3a13cef6c8546ca1922b9d855658 4.0.0