diff --git a/.hgtags b/.hgtags
index 3ea59da9b4..236cc1be92 100644
--- a/.hgtags
+++ b/.hgtags
@@ -5,3 +5,4 @@ a931d453c16a9876a04476000d096a3df52c315d 5.6.0
 cf1522d4c210d9bf3c45020b318126646f7ab295 5.8.0
 3e711a6f97ab7693ac702072837b3372ba36816c 6.0.0
 fe590734637d0a22bac00bf9b7e42b89855e1d85 6.2.0
+00abec422c0e6acb9cbd0db842f17ea7f9366112 6.4.0