It is really hard for DFP to not allow non-secure creatives as long as you can create 3rd-party creatives. They do try to detect non-secure assets though, so they won&#x27;t run on secure pages. See: <a href="https:&#x2F;&#x2F;support.google.com&#x2F;dfp_premium&#x2F;answer&#x2F;4515432?hl=en" rel="nofollow">https:&#x2F;&#x2F;support.google.com&#x2F;dfp_premium&#x2F;answer&#x2F;4515432?hl=en</a>