diff --git a/config/packages/nelmio_security.yaml b/config/packages/nelmio_security.yaml
index e32e5a9..7e900a8 100644
--- a/config/packages/nelmio_security.yaml
+++ b/config/packages/nelmio_security.yaml
@@ -36,6 +36,7 @@ nelmio_security:
                 - "https://challenges.cloudflare.com"
                 - "https://tools-security.esy-web.dev"
                 - "https://checkout.stripe.com/"
+                - "https://cdnjs.cloudflare.com"
             frame-src:
                 - "'self'"
                 - "https://chat.esy-web.dev"