diff --git a/hosting/letsencrypt/nginx-ssl.conf b/hosting/letsencrypt/nginx-ssl.conf
index b3f51e5cc5..710ce2d22d 100644
--- a/hosting/letsencrypt/nginx-ssl.conf
+++ b/hosting/letsencrypt/nginx-ssl.conf
@@ -41,6 +41,11 @@ server {
     }
 
     location ~ ^/api/(system|admin|global)/ {
+        # Enable buffering for potentially large OIDC configs
+        proxy_buffering on;
+        proxy_buffer_size 16k;
+        proxy_buffers 4 32k;
+        
         proxy_pass      http://127.0.0.1:4002;
     }