diff --git a/flask/requirements.txt b/flask/requirements.txt
index 28385b49..95ef7bbc 100644
--- a/flask/requirements.txt
+++ b/flask/requirements.txt
@@ -4,7 +4,7 @@ Flask-Bootstrap==3.3.7.1
 Flask-Uploads==0.2.1
 Flask-WTF==0.15.1
 itsdangerous==1.1.0
-Jinja2==2.11.3
+Jinja2==3.1.3
 MarkupSafe==2.0.1
 python-dotenv==0.17.1
 visitor==0.1.3