diff --git a/.hgtags b/.hgtags
index b07757637c..1de068a406 100644
--- a/.hgtags
+++ b/.hgtags
@@ -15,3 +15,4 @@ e42f713281f747681fe9c20c822a276f5f9b729c 5.4.0
 538501607c2f00960a49f89d4249855ef0ce15cb 6.0.0
 96805268ecec102422312d4dcb66e51dc72f7ee3 6.2.0
 ccd0735b90fe580dfe719273d80f448dd05359af 6.4.0
+9f545c6ac69864520310f5e8d117e83a9b8e6b81 6.6.0