diff --git a/website/docs/providers/proxy/_envoy_istio.md b/website/docs/providers/proxy/_envoy_istio.md
index c72e8f1e3d..4aaf21a036 100644
--- a/website/docs/providers/proxy/_envoy_istio.md
+++ b/website/docs/providers/proxy/_envoy_istio.md
@@ -20,6 +20,9 @@ spec:
                   headersToUpstreamOnAllow:
                       - set-cookie
                       - x-authentik-*
+                      # Add authorization headers to the allow list if you need proxy providers which
+                      # send a custom HTTP-Basic Authentication header based on values from authentik
+                      # - authorization
                   includeRequestHeadersInCheck:
                       - cookie
 ```