diff --git a/examples/016_tasks_handlers/demo/app/requirements.txt b/examples/016_tasks_handlers/demo/app/requirements.txt
index 93c347e..909c826 100644
--- a/examples/016_tasks_handlers/demo/app/requirements.txt
+++ b/examples/016_tasks_handlers/demo/app/requirements.txt
@@ -1,7 +1,7 @@
 click==7.1.2
 Flask==1.1.4
 Flask-SQLAlchemy==2.5.1
-greenlet==3.0.5
+greenlet==3.5.0
 itsdangerous==1.1.0
 Jinja2==2.11.3
 MarkupSafe==2.0.1