diff --git a/.zuul.yml b/.zuul.yml
index b2efeea..4a493b0 100644
--- a/.zuul.yml
+++ b/.zuul.yml
@@ -5,4 +5,8 @@ browsers:
   - name: firefox
     version: latest
   - name: ie
-    version: 9..latest
\ No newline at end of file
+    version: 9..latest
+concurrency: 1
+tunnel:
+  type: ngrok
+  bind_tls: false
diff --git a/package.json b/package.json
index 8148e5a..e500038 100644
--- a/package.json
+++ b/package.json
@@ -45,7 +45,8 @@
     "jshint": "^2.9.5",
     "mocha": "^3.0.2",
     "uglify-js": "^3.4.6",
-    "zuul": "^3.11.0"
+    "zuul": "^3.11.0",
+    "zuul-ngrok": "nolanlawson/zuul-ngrok#patch-1"
   },
   "spm": {
     "main": "mustache.js",