diff --git a/nginx.conf b/nginx.conf
index f5ba9a1..71b8707 100644
--- a/nginx.conf
+++ b/nginx.conf
@@ -48,7 +48,7 @@ http {
         }
 
         location /health {
-            add_header Content-Type text/plain;
+            default_type text/plain;
             access_log off;
             return 200 "OK";
         }