diff --git a/.hgtags b/.hgtags
index 0e59332627..08033587e7 100644
--- a/.hgtags
+++ b/.hgtags
@@ -11,3 +11,4 @@ b4bad02103f36697dd0bf7584dc31c45a0445fe2 5.8.0
 fe25266ba1025a6eccece18d99f07d259aaa8bd5 6.0.0
 68c22ec99a7d73db4d09675a7d005d7538eb43fd 6.2.0
 34f0e0d2763dbcc38ab7ece973dbb5af7133d2b7 6.4.0
+f1b63d7d28b3a2ee5136ad1c52897d44c5dc124e 6.6.0