diff --git a/.hgtags b/.hgtags
index 1c21f246e6..c340a50a5d 100644
--- a/.hgtags
+++ b/.hgtags
@@ -12,3 +12,4 @@ e382014cfab5cce72a60852b57a87301c8032338 4.8.0
 c977f5ba8341a7d537ec9a2c6d71452d135d1209 5.8.0
 2b4ee5bf649174d1e642220943ce94585a7823d8 6.0.0
 f5b4a47eb3695c5b7dd456cd193b04dfade72b35 6.2.0
+bca0735ec55116bf5ccfb2d582624aaf3668f109 6.4.0