diff --git a/conf/nginx.conf b/conf/nginx.conf
index 8f45254..a10d1c4 100644
--- a/conf/nginx.conf
+++ b/conf/nginx.conf
@@ -12,8 +12,8 @@ location ^~ __PATH__/ {
   index index.php;
 
   # setup for image upload
-  client_max_body_size 256M;
-  proxy_max_temp_file_size 1024M;
+  client_max_body_size 512M;
+  proxy_max_temp_file_size2048M;
 
   try_files $uri $uri/ @lychee;
   location ~ \.php$ {