diff --git a/pp-keycloak.nix b/pp-keycloak.nix
index 5e57e3f..f24019d 100644
--- a/pp-keycloak.nix
+++ b/pp-keycloak.nix
@@ -61,6 +61,9 @@ in
           locations."/" = {
             proxyPass = "http://127.0.0.1:8080";
             extraConfig = ''
+              proxy_buffer_size   128k;
+              proxy_buffers   4 256k;
+              proxy_busy_buffers_size   256k;
               proxy_set_header X-Forwarded-Host $host;
               proxy_set_header X-Forwarded-Server $host;
               proxy_set_header X-Real-IP $remote_addr;