diff --git a/src/api-client.lisp b/src/api-client.lisp
index 11c43cf..cc3372a 100644
--- a/src/api-client.lisp
+++ b/src/api-client.lisp
@@ -152,13 +152,12 @@ This function perfom the latest of this actions."
                   (if matched
                       (prog1
                           (first (cl-ppcre:split "(&)|(\\p{White_Space})" (first-elt query-string)))
-                        (let ((*standard-output* stream)
-                              (endline (format nil "~C~C" #\return #\linefeed)))
-                          (format t "HTTP/1.1 200 OK~a" endline)
-                          (format t "Content-Type: text/html; charset=UTF-8~a" endline)
-                          (format t "Connection: close~a" endline)
-                          (format t "~a" endline)
-                          (format t "<p>~a</p>"
+                        (let ((endline (format nil "~C~C" #\return #\linefeed)))
+                          (format stream "HTTP/1.1 200 OK~a" endline)
+                          (format stream "Content-Type: text/html; charset=UTF-8~a" endline)
+                          (format stream "Connection: close~a" endline)
+                          (format stream "~a" endline)
+                          (format stream "<p>~a</p>"
                                   (_ "Tinmop has been successfully authorized, you can close this tab."))))
                       nil)))
            (usocket:socket-close client-socket)))