diff --git a/.hgtags b/.hgtags
index fc65804e3f..cbfcb9ccff 100644
--- a/.hgtags
+++ b/.hgtags
@@ -9,3 +9,4 @@ ef9846cb18afe62182de446d8e4fa7b8393f7168 2.4.0
 61013c4482fc95a61d2a15a8b21574a706755b10 3.4.0
 2a2503ebd25887ff3668d470809c00c5bcf2c6c7 3.6.0
 1e741a18e2a1f29fcc66e9ab4878554a4e63a355 3.8.0
+403f21dd1bb7059a0928c46c8b21a97c14f9c720 4.0.0