diff --git a/index.html b/index.html
index 9faed5ee..bc5b20f5 100644
--- a/index.html
+++ b/index.html
@@ -2,7 +2,10 @@
 <html lang="en-US">
 	<head>
 		<meta charset="UTF-8" />
-    <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0" />
+		<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0" />
+		<!-- to use external scripts append their origin (with trailing /) to the list of script-src -->
+		<meta http-equiv="Content-Security-Policy" content="default-src 'self'; script-src 'self' https://code.jquery.com/; img-src *">
+    
 
 		<link rel="stylesheet" href="css/styles.css" type="text/css" />
 	</head>
@@ -179,4 +182,4 @@ <h2>Tweets</h2>
 			</div><!-- #main -->
 		</div><!-- #page-container -->
 	</body>
-</html>
\ No newline at end of file
+</html>
