diff --git a/public/index.html b/public/index.html
index 022b9c3..c355ece 100644
--- a/public/index.html
+++ b/public/index.html
@@ -1,6 +1,7 @@
 <!DOCTYPE html>
 <html lang="en">
   <head>
+    <meta http-equiv="Content-Security-Policy">
     <meta charset="utf-8">
     <meta http-equiv="X-UA-Compatible" content="IE=edge">
     <meta name="viewport" content="width=device-width,initial-scale=1.0">