diff --git a/systems/x86_64-linux/sgx/nginx.nix b/systems/x86_64-linux/sgx/nginx.nix
index 9c5c40e..c8854f5 100644
--- a/systems/x86_64-linux/sgx/nginx.nix
+++ b/systems/x86_64-linux/sgx/nginx.nix
@@ -21,7 +21,7 @@
         useACMEHost = "internal.hoyer.world";
         forceSSL = true;
         locations."/" = {
-          proxyPass = "http://127.0.0.1:${config.services.open-webui.port}";
+          proxyPass = "http://127.0.0.1:${toString config.services.open-webui.port}";
         };
       };
     };