diff --git a/.hgtags b/.hgtags
index a57df8a2..251fad8e 100644
--- a/.hgtags
+++ b/.hgtags
@@ -74,3 +74,4 @@ fad463ae749b7189dce92f1e42a57ac4ee03987d se3.3.3
 c153aef25e5c9911f2197d13899591c50cf38ffc se3.4.1
 71b7e18613f3790cea18cb0dd8c9c986ce237267 me6.3.1
 c3d9f91dc9c9d60f370c72bc211f09be3e4fc18d se3.5.0
+254bce83ad6e56c102d69fd603f6845e2324b470 me6.4.0