diff --git a/app.json b/app.json
index 71cf1d5..f1899d6 100644
--- a/app.json
+++ b/app.json
@@ -21,6 +21,10 @@
     "CALLBACK": {
       "description": "The callback URL",
       "value": "http://your-app.herokuapp.com/callback"
+    },
+    "NODE_ENV": {
+      "description": "The node environment",
+      "value": "prod"
     }
   }
 }