diff --git a/.hgtags b/.hgtags
index 64d9ef4bf6..8e31fc1a85 100644
--- a/.hgtags
+++ b/.hgtags
@@ -23,3 +23,4 @@ c71cbf353d3e9ddd3b354367d50f58bdaac66af1 5.2.0
 7a46dfb81e38fe0bbe9a9fa78e10226476a422b7 5.8.0
 abf29d2d8ecf3ac2d2b4639af36d16881fdae55b 6.0.0
 3e14e993af748f1721520bb8dc83620ade5c7e91 6.2.0
+bff5ab5cf6dc21a96258cfc8582a387107c248fc 6.4.0