diff --git a/.hgtags b/.hgtags
index 709d64c978..8bc6272332 100644
--- a/.hgtags
+++ b/.hgtags
@@ -1 +1,2 @@
 9f34c79d46c2d737af28e5989d170dc4c29f8bca 3.8.0
+e9dfc299f0412d0a1d6ab4fa779ce8e1879e0289 4.0.0