diff --git a/docker/nginx/default.conf b/docker/nginx/default.conf
index 221860f..8e82b89 100644
--- a/docker/nginx/default.conf
+++ b/docker/nginx/default.conf
@@ -8,7 +8,7 @@ server {
     location ~* \.php$ {
         try_files $uri $uri/ /index.php last;
         fastcgi_split_path_info (.+?\.php)(/.*)$;
-        fastcgi_pass localhost:9000;
+        fastcgi_pass signer:9000;
         fastcgi_index index.php;
         include fastcgi_params;
         fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;