diff --git a/.hgtags b/.hgtags
index 9e9cb1fa56..c6d28b3ca9 100644
--- a/.hgtags
+++ b/.hgtags
@@ -1,3 +1,4 @@
 7a9ed5ed2e70476e8f57fdaf2d86d021b85dd5e5 5.8.0
 7cec047bb9e60951bf876adc7e30d9194d73fded 6.0.0
 59f13e809131b9e4c5b34cdab546b7cd35907513 6.2.0
+b15c62f56a92d136463cd924ee5f8eedec3f01f8 6.4.0