diff --git a/.hgtags b/.hgtags
index 62d7faa0a2..b975e060af 100644
--- a/.hgtags
+++ b/.hgtags
@@ -7,3 +7,4 @@ e8288a46f778b1b9d56dd86b0ed84aff4627381b 5.8.0
 7243e90e43a7d921512808aa05100cee213bc93a 6.0.0
 96aa1de769527ed317b90961f5185eea5e3a55ea 6.2.0
 f3b55e1f797a0bdbdfc565f5cd3955e8a4f516cb 6.4.0
+e88dea3381ea7aa9f83ca988b7ce5c1ebd69a4d7 6.6.0