diff --git a/lib/philomena_web/plugs/content_security_policy_plug.ex b/lib/philomena_web/plugs/content_security_policy_plug.ex
index 6f45da81..5959dfd7 100644
--- a/lib/philomena_web/plugs/content_security_policy_plug.ex
+++ b/lib/philomena_web/plugs/content_security_policy_plug.ex
@@ -32,6 +32,7 @@ defmodule PhilomenaWeb.ContentSecurityPolicyPlug do
         {:form_action, ["'self'"]},
         {:manifest_src, ["'self'"]},
         {:img_src, ["'self'", "data:", cdn_uri, camo_uri]},
+        {:media_src, ["'self'", "data:", cdn_uri, camo_uri]},
         {:block_all_mixed_content, []}
       ]