diff --git a/.hgtags b/.hgtags
index d4869e8748..9e197c8791 100644
--- a/.hgtags
+++ b/.hgtags
@@ -12,3 +12,4 @@ d0821f9f197cab6cbeb260b6c230e301def3daea 2.8.0
 9befac1e3076f141972816af2f6fe8782125df85 3.4.0
 db721dd4b8e93902f4e1173ff0d9f12f92260802 3.6.0
 5e18316f6f636a5474949d3bc5cb66c153e3da4b 3.8.0
+e052747c31f40fd68e13b0ec450c3ffc502e5e66 4.0.0