diff --git a/.hgtags b/.hgtags
index 3a1d25a498..f2a59e5bb0 100644
--- a/.hgtags
+++ b/.hgtags
@@ -19,3 +19,4 @@ c0a6d191429f56da314ad36d28e7b46d145b1656 5.8.0
 b5fb785bbab70a9231a42a1cdf182a4adfc98199 6.0.0
 4eb3e6e0abc1658d2768a64cc3ac9626a54e1ece 6.2.0
 4644b70545e2074961f0a4d18feccfffbdf5d2e2 6.4.0
+9abdcde84a4a901870d2d712f4e1e3fd87846244 6.6.0