diff --git a/app/scripts/network-helper.js b/app/scripts/network-helper.js
index e713a5c..be837b6 100644
--- a/app/scripts/network-helper.js
+++ b/app/scripts/network-helper.js
@@ -42,6 +42,11 @@ module.exports.fetchHTML = async function (url) {
         shared.logger.warn(`Unable to fetch HTML for ${url}`);
         return null;
     }
+    else if (!response.headers["content-type"].includes("text/html")) {
+        // The response is not a HTML page
+        shared.logger.warn(`The ${url} returned a ${response.headers["content-type"]} response`);
+        return null;
+    }
     return response.data;
 };