diff --git a/.hgtags b/.hgtags
index 028d7c3cdc..a4579b7312 100644
--- a/.hgtags
+++ b/.hgtags
@@ -1 +1,2 @@
 5e6544b5721589986fb34fb9d8189b96113a1812 3.8.0
+1452882cb48099b2b8774488952ef0da93549fba 4.0.0