diff --git a/src/upgrades/1.10.0/view_deleted_privilege.js b/src/upgrades/1.10.0/view_deleted_privilege.js
index 2494d8b2c6..2d7f7410e0 100644
--- a/src/upgrades/1.10.0/view_deleted_privilege.js
+++ b/src/upgrades/1.10.0/view_deleted_privilege.js
@@ -18,7 +18,7 @@ module.exports = {
 				async.waterfall([
 					async.apply(db.getSortedSetRange.bind(db), 'group:cid:' + cid + ':privileges:moderate:members', 0, -1),
 					function (uids, next) {
-						async.each(uids, (uid, next) => groups.join('cid:' + cid + ':privileges:posts:view_deleted', uid, next), next);
+						async.eachSeries(uids, (uid, next) => groups.join('cid:' + cid + ':privileges:posts:view_deleted', uid, next), next);
 					},
 				], next);
 			}, callback);