diff --git a/.hgtags b/.hgtags
index 31b667f30c..4117a10757 100644
--- a/.hgtags
+++ b/.hgtags
@@ -4,3 +4,4 @@
 a60f0bcd2fa08bb785bf8090b58e4b023c5b97d3 6.0.0
 beafebc0035e2da56414691f6101a04e2edb8c5c 6.2.0
 be0373f2c571c7abe516b6731be295ee1a58d046 6.4.0
+0ac4d1dee92a2d241ed3f4644d363288fa163fc1 6.6.0