diff --git a/.hgtags b/.hgtags
index ea26b49477..924bdbf842 100644
--- a/.hgtags
+++ b/.hgtags
@@ -16,3 +16,4 @@ b2b863a78064e4324237d10f17ed3001703c7c13 5.8.0
 d660bd5979030f91ff945fb68a1402e85a57e006 6.0.0
 677012ee69b8dced3cd9391374943994d3c12048 6.2.0
 2ac37bcedb1c37c0568f1f2a3f47a685edec81f1 6.4.0
+bd44515334a9e4ce95ad522c458e3aace18ec23f 6.6.0