diff --git a/examples/hello.py b/examples/hello.py
index 7c7aaa8..f894d1a 100644
--- a/examples/hello.py
+++ b/examples/hello.py
@@ -21,13 +21,13 @@ Session(app)
 
 
 @app.route('/set/')
-def set():
+async def set():
     session['key'] = 'value'
     return 'ok'
 
 
 @app.route('/get/')
-def get():
+async def get():
     return session.get('key', 'not set')