diff --git a/.hgtags b/.hgtags
index 4ca48c827..b318857e6 100644
--- a/.hgtags
+++ b/.hgtags
@@ -158,3 +158,4 @@ f461a49b6c747e0b67f721f2be172902afea5528 release-0.5.23
 7ac0fe9bec9a2b5f8e191f6fdd6922bfd916a6cb release-0.6.1
 4882735ebc71eeec0fbfe645bdfdb31306872d82 release-0.6.2
 b94731c73d0922f472ff938b9d252ba29020f20c release-0.6.3
+13e649b813d6ccba5db33a61e08ebe09d683cd5b release-0.6.4