diff --git a/.hgtags b/.hgtags
index 561fc50995..36229383ed 100644
--- a/.hgtags
+++ b/.hgtags
@@ -11,3 +11,4 @@ a06b07a57eda21c729548ef099d4826588d96b56 4.6.0
 e41913519899a366dcdc69e0510bb7bf7c522829 6.0.0
 d2276de60872d79ed2c4c587ad725a5ab678e910 6.2.0
 29fe9e3d2dcfa6a866c7ddd1280ca483135320f2 6.4.0
+4660eb7041376514bb97937c25ec23f7411a8826 6.6.0