diff --git a/.hgtags b/.hgtags
index 60d8632471..de1985f01a 100644
--- a/.hgtags
+++ b/.hgtags
@@ -24,3 +24,4 @@ dbec1eac9dc4167e1307adbc62ef72bc7937d5ef 5.6.0
 00c0bad66396daf07d8c5f78dd8dae4ed0e421a4 5.8.0
 5a0e8f4810783920576928b183e3733693959da8 6.0.0
 a19ed98c7d062115451f9ed8d1e5c09017cd6b72 6.2.0
+ec2dcacd13e91cae985e8a259459a2a1c1185cae 6.4.0