diff --git a/.hgtags b/.hgtags
index a3f5d9f149..26e102a863 100644
--- a/.hgtags
+++ b/.hgtags
@@ -13,3 +13,4 @@ f12b310c171a7db2ccc6b5ef8124b2226c43cd95 3.0.0
 3d5d38b4e1ffefc96d2f246a0a94f891954bfa2f 3.4.0
 88274ee63deab532817641c9ecb08ea64261994a 3.6.0
 a08cb664e6f2e8d08f82131cef9ad12680605bad 3.8.0
+72aaaea3ff8c1c6dc2525e487e2c03eeb5c315d1 4.0.0