diff --git a/requirements.txt b/requirements.txt
index 69a4f5302..fc2fce5b3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -19,7 +19,7 @@
 # IN THE SOFTWARE.
 
 # Direct dependencies
-jinja2>=2.11.1
+jinja2>=2.11.1,<3.1
 markdown>=3.2
 mkdocs>=1.2.3
 mkdocs-material-extensions>=1.0