diff --git a/templates/base.html b/templates/base.html
index ac39446..b21709c 100644
--- a/templates/base.html
+++ b/templates/base.html
@@ -11,7 +11,7 @@
       content="width=device-width, initial-scale=1, shrink-to-fit=no"
     />
 
-    <meta http-equiv="Content-Security-Policy" content="script-src 'self' http://*.jsdelivr.net ">
+    <meta http-equiv="Content-Security-Policy" content="default-src 'self' https://*.jsdelivr.net https://stackpath.bootstrapcdn.com https://acl2020.rocket.chat/">
 
     <!-- External Javascript libs  -->
     <script src="https://cdn.jsdelivr.net/npm/d3@5/dist/d3.min.js"></script>