diff --git a/.hgtags b/.hgtags
index c776236934..ae935faf83 100644
--- a/.hgtags
+++ b/.hgtags
@@ -15,3 +15,4 @@ ea9261c209bcd28dafd29205c58f2199596eef50 5.8.0
 5defabd519cf5e50cde2f4779d889abe22f28b75 6.0.0
 5e4ce2cb6dd127fc4b76454e95cccbf4ee88f090 6.2.0
 6701a829ded00feb53d7be272c890dc51d80ad07 6.4.0
+103d069a79ade9bfe05f1d9471a457246f9821b8 6.6.0