diff --git a/oidc_example/simple_op/requirements.txt b/oidc_example/simple_op/requirements.txt
index fb7b9a62..6d1ed842 100644
--- a/oidc_example/simple_op/requirements.txt
+++ b/oidc_example/simple_op/requirements.txt
@@ -1,4 +1,4 @@
 cherrypy==3.2.4
 pyaml==15.03.1
-Jinja2==2.11.3
+Jinja2==3.1.3
 yubico-client==1.9.1