diff --git a/.hgtags b/.hgtags
index 646635f536..7516f02d46 100644
--- a/.hgtags
+++ b/.hgtags
@@ -5,3 +5,4 @@ ff56baf85214a350c451429d7b7e5c82f079dfbf 5.6.0
 541b72abe187e80ae8d546d957d3c31cdfc096b6 6.0.0
 87a8e2696b48cc51872dfba87ee647bc4a1e1ef4 6.2.0
 412aff52e0f07ece84c0bf1fe4f514c91fbcbb50 6.4.0
+4387b9678c83d5d90454eb76ca6dcbf868a75378 6.6.0