diff --git a/source/requirements.txt b/source/requirements.txt
index b336fcc..998780b 100644
--- a/source/requirements.txt
+++ b/source/requirements.txt
@@ -13,7 +13,7 @@ idna==2.8
 imagesize==1.1.0
 importlib-metadata==0.19
 inflection==0.3.1
-Jinja2==2.11.3
+Jinja2==3.1.3
 livereload==2.6.1
 Markdown==3.1.1
 MarkupSafe==1.1.1