diff --git a/.hgtags b/.hgtags
index e46f4e0a02..601b15ee83 100644
--- a/.hgtags
+++ b/.hgtags
@@ -26,3 +26,4 @@ c33b1c4ded6131bc1daa8d0c39776a2735dfaf43 5.6.0
 85c9e817c85c86aca2f2f495e6dc5a72a5de6ff4 6.0.0
 a867bf62f280de5a07eab7b6ab1d63a8422ab162 6.2.0
 3f9efba89d1e199324c2dfe3a3b0b239d1769e4b 6.4.0
+f8063380d852faa4b5c36b50686775c9d85f0a51 6.6.0