diff --git a/examples/server/wsgi/requirements.txt b/examples/server/wsgi/requirements.txt
index fcef9fa..25022e2 100644
--- a/examples/server/wsgi/requirements.txt
+++ b/examples/server/wsgi/requirements.txt
@@ -2,7 +2,7 @@ Click==7.0
 enum-compat==0.0.2
 enum34==1.1.6
 eventlet==0.20.1
-Flask==1.0.2
+Flask==2.3.2
 greenlet==0.4.12
 itsdangerous==1.1.0
 Jinja2==2.11.3