diff --git a/.hgtags b/.hgtags
index 8606542bb5..bc91b279bf 100644
--- a/.hgtags
+++ b/.hgtags
@@ -11,3 +11,4 @@ da18123e3fd5dccc41fb6f0385078c73d2f133ac 5.6.0
 2c985bccb02403f187f09b68c6869aa6daf8717a 5.8.0
 0d35637e6b73934bbc6edd6accabb7bf1841e77c 6.0.0
 04832390b9f8b27fde64024764b61515435c5f31 6.2.0
+b0ceb357f0f05712ec08b62be561e9d4c97fe2b1 6.4.0