diff --git a/index.html b/index.html
index 6ceff48..cd5c2e3 100644
--- a/index.html
+++ b/index.html
@@ -136,7 +136,7 @@
       </div>
 
 
-      <script src="https://unpkg.com/vue/dist/vue.js"></script>
+      <script src="https://unpkg.com/vue@2.6.12/dist/vue.js"></script>
       <script src="./dist/vue-observe-visibility.min.js"></script>
       <script>
         // App