diff --git a/.hgtags b/.hgtags
index 565fe93..f61f758 100644
--- a/.hgtags
+++ b/.hgtags
@@ -20,3 +20,4 @@ e0bf6337288b13cb341ce8cb41ba51f5bfb5ad64 1.5.10
 b8c5b2605d9ebe3062af64ed42523433fc90ca57 1.6.3
 760ef366bcf6d816a9f738cd362982651f7d51f1 1.6.0
 05777cc83dfd32383cb9330161e058186ee24150 1.6.1
+4f4444ad82c6b916864c861f1eff3d480abf9741 1.6.6