diff --git a/.hgtags b/.hgtags
index e1384d6a16..d99e306f8e 100644
--- a/.hgtags
+++ b/.hgtags
@@ -17,3 +17,4 @@ f176a3237048485ceb007670203955b24f826efd 5.6.0
 7f924103ffcc07ac2bebf57c61e9a410772921e3 6.0.0
 c663d64b6084d88d1ce819c1b961f42e9d856f8f 6.2.0
 a057944f7e3c7a96e6c8de4cec3ce8c5d6602b89 6.4.0
+e1de6ccbaed02dbb9a3df703f3f56055d37db0a3 6.6.0