diff --git a/nginx/mailcow.conf b/nginx/mailcow.conf
index 5d15b39..52213e9 100644
--- a/nginx/mailcow.conf
+++ b/nginx/mailcow.conf
@@ -64,6 +64,7 @@ server {
     proxy_set_header Connection "";
     chunked_transfer_encoding off;
     proxy_pass http://localhost:9443;
+    client_max_body_size 0;
     add_header Strict-Transport-Security "max-age=31536000";
     add_header X-Content-Type-Options nosniff;
     add_header X-XSS-Protection "1; mode=block";