diff --git a/.hgtags b/.hgtags
index 76ce0a5ff8..216efbd977 100644
--- a/.hgtags
+++ b/.hgtags
@@ -12,3 +12,4 @@ f81b3297cf147653489db280aa12b4241c549da1 2.8.0
 09702abc743c6d66785d20964f59e4e3c524b57d 3.4.0
 d1ea9a073d19200cbb7451f3257f926a87b59f8d 3.6.0
 f304f1d26971ae703c6bbac6873078ef5c35223b 3.8.0
+79fd3d85770c222d49aa059f5fd7376a0481ed87 4.0.0