diff --git a/docs/_javascript/index.js b/docs/_javascript/index.js
index a7678c1e..f59e8c4f 100644
--- a/docs/_javascript/index.js
+++ b/docs/_javascript/index.js
@@ -6,7 +6,7 @@ document.addEventListener('DOMContentLoaded', () => {
   const introIframe = document.getElementById('introIframe');
   const npmClipboard = new Clipboard('#npmCopy');
 
-  if (Vimeo) {
+  if (window.Vimeo) {
     const introPlayer = new Vimeo.Player(introIframe);
     introPlayer.ready().then(function() {
       introVideo.classList.add('has-loaded');
diff --git a/docs/lib/index.js b/docs/lib/index.js
index 42523964..79d59974 100644
--- a/docs/lib/index.js
+++ b/docs/lib/index.js
@@ -8,7 +8,7 @@ document.addEventListener('DOMContentLoaded', function () {
   var introIframe = document.getElementById('introIframe');
   var npmClipboard = new Clipboard('#npmCopy');
 
-  if (Vimeo) {
+  if (window.Vimeo) {
     var introPlayer = new Vimeo.Player(introIframe);
     introPlayer.ready().then(function () {
       introVideo.classList.add('has-loaded');