diff --git a/server.py b/server.py
index 430d1dc7..fdcd308b 100644
--- a/server.py
+++ b/server.py
@@ -9,11 +9,11 @@ class Handler(http.server.SimpleHTTPRequestHandler):
     def do_GET(self):
         self.send_response(HTTPStatus.OK)
         self.end_headers()
-        msg = 'Hello! you requested %s' % (self.path)
+        msg = f'Hello! you requested {self.path}'
         self.wfile.write(msg.encode())
 
 
 port = int(os.getenv('PORT', 80))
-print('Listening on port %s' % (port))
+print(f'Listening on port {port}')
 httpd = socketserver.TCPServer(('', port), Handler)
 httpd.serve_forever()