diff --git a/.hgtags b/.hgtags
index 7a6a52e207..c4ef975e58 100644
--- a/.hgtags
+++ b/.hgtags
@@ -9,3 +9,4 @@ df952bd9a9312169cce9a3559a6808fd15ce729f 5.2.0
 5fa8a7ad24a9d9c5726f08a174c22696480bb3c9 6.0.0
 63c1d22cdd2cb1a4ebc8c3b1e71d3b18487060d2 6.2.0
 d823ffc0ccd4eb62d5621560582b03253fddb346 6.4.0
+a4431f200ae5d4e89fb90795c88258261156220d 6.6.0