diff --git a/lib/middleware.js b/lib/middleware.js
index 014b225d..c41e75d0 100644
--- a/lib/middleware.js
+++ b/lib/middleware.js
@@ -23,6 +23,7 @@ export const useSession = use(async (req, res, next) => {
   try {
     session = await getSession(req);
   } catch (e) {
+    console.error(e);
     return serverError(res, e.message);
   }
 
diff --git a/tracker/index.js b/tracker/index.js
index e3cb4fe4..38aadeb3 100644
--- a/tracker/index.js
+++ b/tracker/index.js
@@ -1,6 +1,4 @@
-import 'promise-polyfill/src/polyfill';
-import 'unfetch/polyfill';
-import { doNotTrack, hook, post } from '../lib/web';
+import { doNotTrack, hook } from '../lib/web';
 import { removeTrailingSlash } from '../lib/url';
 
 (window => {
@@ -32,6 +30,20 @@ import { removeTrailingSlash } from '../lib/url';
 
   /* Collect metrics */
 
+  const post = (url, data, callback) => {
+    const req = new XMLHttpRequest();
+    req.open('POST', url, true);
+    req.setRequestHeader('Content-Type', 'application/json');
+
+    req.onreadystatechange = () => {
+      if (req.readyState === 4) {
+        callback && callback();
+      }
+    };
+
+    req.send(JSON.stringify(data));
+  };
+
   const collect = (type, params, uuid) => {
     const payload = {
       website: uuid,
@@ -133,5 +145,7 @@ import { removeTrailingSlash } from '../lib/url';
     history.replaceState = hook(history, 'replaceState', handlePush);
 
     pageView(currentUrl, currentRef);
+
+    loadEvents();
   }
 })(window);