diff --git a/calibre_web/rootfs/etc/nginx/servers/ingress.conf b/calibre_web/rootfs/etc/nginx/servers/ingress.conf
index e14ea7024..faafc5894 100644
--- a/calibre_web/rootfs/etc/nginx/servers/ingress.conf
+++ b/calibre_web/rootfs/etc/nginx/servers/ingress.conf
@@ -16,6 +16,7 @@ server {
        proxy_set_header        X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header        X-Scheme        $scheme;
        proxy_set_header        X-Script-Name   %%UIPATH%%;  # IMPORTANT: path has NO trailing slash
+       proxy_set_header        X-Forwarded-Proto $scheme; # Avoids mixed content
     }
 }