diff --git a/scripts/driver.requirements.txt b/scripts/driver.requirements.txt
index 5a3e76a0e..17569bb17 100644
--- a/scripts/driver.requirements.txt
+++ b/scripts/driver.requirements.txt
@@ -2,7 +2,8 @@
 
 # Use the version of Jinja that's in Ubuntu 20.04.
 # See https://github.com/ARMmbed/mbedtls/pull/5067#discussion_r738794607 .
-# Note that Jinja2 3.0 drops support for Python 3.5, so we need 2.x.
+# Note that Jinja 3.0 drops support for Python 3.5, so we need to support
+# Jinja 2.x as long as we're still using Python 3.5 anywhere.
 Jinja2 >= 2.10.1
 # Jinja2 >=2.10, <<3.0 needs a separate package for type annotations
 types-Jinja2