diff --git a/.hgtags b/.hgtags
index f264f51ca1..f6f4a468dd 100644
--- a/.hgtags
+++ b/.hgtags
@@ -2,3 +2,4 @@
 214c0ae0defc5d398a757857953aa3b73e8daaa9 3.4.0
 96118825d91dfa186e344ad464592145bdbdbc03 3.6.0
 234e6dd84adc0e12d1bd4424ac95ea3c53bd8e41 3.8.0
+d753906e57e00e17b3dc46723bc84c51dcac4312 4.0.0