diff --git a/.hgtags b/.hgtags
index 2eb1b064a2..5c6957b9c9 100644
--- a/.hgtags
+++ b/.hgtags
@@ -1,2 +1,3 @@
 f319ec0ab83850bfbc4dbf0c1e3f88923d4c6ba4 3.6.0
 086daa04833949d995472901fff5f58a5ad1ea7c 3.8.0
+f13eceee4f070ddd92d5bf3b4e37723989b25de5 4.0.0