diff --git a/.hgtags b/.hgtags
index 4464216a5d..a8f8ed91e8 100644
--- a/.hgtags
+++ b/.hgtags
@@ -20,3 +20,4 @@ b89599b1cef0267371ce55e1b41cb1958d3312ba 5.6.0
 579edbea3863be427cfc1bb76cec03d061732d90 6.0.0
 e979007c21a4054f31741b30aed287cd5a638ebe 6.2.0
 91add9ae71e1343bccacf5479b71eb0108eb4de1 6.4.0
+1c7acdc192cc44cb913b7aa9165062b1cb1d8873 6.6.0