diff --git a/main.rb b/main.rb
index d6bf13e..a561e19 100644
--- a/main.rb
+++ b/main.rb
@@ -89,7 +89,7 @@ def auth
 end
 
 post '/auth' do
-	set_cookie(Blog.admin_cookie_key, Blog.admin_cookie_value) if params[:password] == Blog.admin_password
+	response.set_cookie(Blog.admin_cookie_key, Blog.admin_cookie_value) if params[:password] == Blog.admin_password
 	redirect '/'
 end