diff --git a/models/cards.js b/models/cards.js
index e55ac3f9a..9236fcaaa 100644
--- a/models/cards.js
+++ b/models/cards.js
@@ -72,7 +72,7 @@ Cards.attachSchema(new SimpleSchema({
   },
   assignedBy: {
     type: String,
-    optional: true
+    optional: true,
   },
   labelIds: {
     type: [String],