diff --git a/.hgtags b/.hgtags
index 0ba66e1037..99e16b8e9f 100644
--- a/.hgtags
+++ b/.hgtags
@@ -6,3 +6,4 @@ a0e3cefc2fb50003370fbf07a53a2cf75ed16a2c 5.6.0
 98987a9131330ded23570dd3209d02ac07d79c70 6.0.0
 f1e9967531954978ceb15317bf4edc630f5807a7 6.2.0
 b72c63d53c7667c639fcc2be0673471ceaa5b7ab 6.4.0
+ff04b5b003854a9caeccec2741f8c4d8b2230f7e 6.6.0