diff --git a/lib/fetch-url.js b/lib/fetch-url.js
index 6ab7614..9f3e2d9 100644
--- a/lib/fetch-url.js
+++ b/lib/fetch-url.js
@@ -6,7 +6,7 @@ const request = require("request");
 module.exports = (urlObj, service) => {
     return new Promise((resolve, reject) => {
         if (typeof urlObj == "string") {
-            urlObj = { urlObj };
+            urlObj = { url: urlObj };
         }
         urlObj.headers = { "User-Agent": "pr-preview" };
         request(urlObj, function (error, response, body) {