diff --git a/setup.py b/setup.py
index 4b7c060b4..adafefd61 100644
--- a/setup.py
+++ b/setup.py
@@ -82,7 +82,7 @@ REQUIRED = [
     "dill",
     "dataclasses;python_version<'3.7'",
     "filelock",
-    "jinja2",  # for passing the readthedocs workflow.
+    "jinja2<3.1.0",  # for passing the readthedocs workflow.
     "gym",
     # Installing the latest version of protobuf for python versions below 3.8 will cause unit tests to fail.
     "protobuf<=3.20.1;python_version<='3.8'",