diff --git a/.hgtags b/.hgtags
index 932b52ffce..54500d3fe0 100644
--- a/.hgtags
+++ b/.hgtags
@@ -1 +1,2 @@
 e41b0c6b1aa6d38a3ead6ded03c76b800b9a8bdf 6.2.0
+ef4a7ff844145c6af80f7a8f696f0ffde952c6cd 6.4.0