diff --git a/requirements.txt b/requirements.txt
index 1af2cb4f..790eabc9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
 git+https://github.com/canonical/operator/#egg=ops
 pyyaml
 urllib3
-jinja2
+jinja2 < 3.0.0