diff --git a/.hgtags b/.hgtags
index 8354ef0942..b2da25de7c 100644
--- a/.hgtags
+++ b/.hgtags
@@ -25,3 +25,4 @@ ec2b60415d119b35cf61b75247abaf5bb67a70b1 4.8.0
 1a8e026150a29d49f552c112f9795b1f2ad035b6 6.0.0
 613034b9778b85d02ae1585a39e90039f13a3695 6.2.0
 47541d334066316ea3296e4eb2004da55c6b5e4f 6.4.0
+2ba005a00d90302b0bf759cf8528df1fca8bbaec 6.6.0