diff --git a/TD1/index.html b/TD1/index.html
index e4a470bb825ccd36aaa096282e8bd3b53b998661..b69b110556749b1f380e4d5f4214952e3fda36d3 100644
--- a/TD1/index.html
+++ b/TD1/index.html
@@ -3,6 +3,7 @@
     <head>
         <link rel="icon" href="favicon.svg"/>
         <link href="/bootstrap.min.css" rel="stylesheet" 
+        integrity="sha384-T3c6CoIi6uLrA9TneNEoa7RxnatzjcDSCmG1MXxSR1GAsXEV/Dwwykc2MPK8M2HN" 
         crossorigin="anonymous">
 
         <title>La revanche des lettres</title>
diff --git a/TD1/level.html b/TD1/level.html
index 649ee66808d3ae9a85ab9475303a5a980b20a648..0c0d57e375441b0cebce977fba18d0a93c4afca5 100644
--- a/TD1/level.html
+++ b/TD1/level.html
@@ -5,6 +5,7 @@
         <link rel="icon" href="favicon.svg" />
         <link href="/bootstrap.min.css" 
               rel="stylesheet"
+              integrity="sha384-T3c6CoIi6uLrA9TneNEoa7RxnatzjcDSCmG1MXxSR1GAsXEV/Dwwykc2MPK8M2HN" 
               crossorigin="anonymous">
     </head>
     <body>