diff --git a/2/templates/preview.html b/2/templates/preview.html
index 4c06078f..89af677c 100644
--- a/2/templates/preview.html
+++ b/2/templates/preview.html
@@ -25,7 +25,7 @@
       vertical-align: -0.1em;
     }
     </style>
-    <script src="https://twemoji.maxcdn.com/2/twemoji.min.js"></script>
+    <script src="https://twemoji.maxcdn.com/2/twemoji.min.js?12.0.1" integrity="sha384-UM2aSky5TK+LGnb3eZ/K+LVxUWpoO1zhIRURk37uiM39vD0oshUZyKZEh3Rd/Gyl" crossorigin="anonymous"></script>
   </head>
   <body>
     <ul class="emoji-list">
diff --git a/2/test/preview-svg.html b/2/test/preview-svg.html
index cb90df79..9f36d44c 100644
--- a/2/test/preview-svg.html
+++ b/2/test/preview-svg.html
@@ -25,7 +25,7 @@
       vertical-align: -0.1em;
     }
     </style>
-    <script src="https://twemoji.maxcdn.com/2/twemoji.min.js?12.0.1"></script>
+    <script src="https://twemoji.maxcdn.com/2/twemoji.min.js?12.0.1" integrity="sha384-UM2aSky5TK+LGnb3eZ/K+LVxUWpoO1zhIRURk37uiM39vD0oshUZyKZEh3Rd/Gyl" crossorigin="anonymous"></script>
   </head>
   <body>
     <ul class="emoji-list">
diff --git a/2/test/preview.html b/2/test/preview.html
index 0bc9e2d9..e08e5563 100644
--- a/2/test/preview.html
+++ b/2/test/preview.html
@@ -25,7 +25,7 @@
       vertical-align: -0.1em;
     }
     </style>
-    <script src="https://twemoji.maxcdn.com/2/twemoji.min.js?12.0.1"></script>
+    <script src="https://twemoji.maxcdn.com/2/twemoji.min.js?12.0.1" integrity="sha384-UM2aSky5TK+LGnb3eZ/K+LVxUWpoO1zhIRURk37uiM39vD0oshUZyKZEh3Rd/Gyl" crossorigin="anonymous"></script>
   </head>
   <body>
     <ul class="emoji-list">
