diff --git a/lib/index.js b/lib/index.js
index 3cc4484..ef26de1 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -100,6 +100,33 @@ module.exports.createFromSession = function (session) {
   }
 }
 
+module.exports.koaMiddlewhere = function (tid, options) {
+  this.tid = tid;
+  this.options = options;
+
+  var cookieName = (this.options || {}).cookieName || "_ga";
+
+  return async function (ctx, next) {
+    ctx.request.visitor = module.exports.createFromSession(ctx.session);
+    if (ctx.request.visitor) {
+      return await next();
+    }
+
+    var cid;
+    if (ctx.cookies && ctx.cookies.get(cookieName)) {
+      var gaSplit = ctx.cookies.get(cookieName).split('.');
+      cid = gaSplit[2] + "." + gaSplit[3];
+    }
+
+    ctx.request.visitor = init(tid, cid, options);
+
+    if (ctx.session) {
+      ctx.session.cid = ctx.request.visitor.cid;
+    }
+
+    await next();
+  }
+};
 
 
 Visitor.prototype = {
diff --git a/package-lock.json b/package-lock.json
index 3bf1fa2..ace6ff6 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "universal-analytics",
-  "version": "0.4.20",
+  "version": "0.4.21",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {