diff --git a/.hgtags b/.hgtags
index af72596cf3..00f75683f8 100644
--- a/.hgtags
+++ b/.hgtags
@@ -8,3 +8,4 @@ bc6b67bbc1c6be7f765ea846a7a9b4705ed7898a 5.4.0
 8cf2cd8b23e95b1b20e0ef6e034f87d22e046c30 6.0.0
 cab63268fbe953836764bf4aa7fde13196c6731d 6.2.0
 62a4a9b4bc573dad815d6edd636d64a82c9ae1e8 6.4.0
+5acfeb4d037de105e2cb054d448eccb96f544d17 6.6.0