diff --git a/example/requirements.txt b/example/requirements.txt
index 722f843..7cefa71 100644
--- a/example/requirements.txt
+++ b/example/requirements.txt
@@ -9,7 +9,7 @@ Flask-MQTT==1.0.5
 Flask-SocketIO==3.3.2
 greenlet==0.4.15
 itsdangerous==1.1.0
-Jinja2==2.11.1
+Jinja2==3.1.3
 MarkupSafe==1.1.1
 monotonic==1.5
 paho-mqtt==1.5.0