diff --git a/requirements.txt b/requirements.txt
index 2a68043b6db513a87e3e1431b279809dac1cdd4b..f4597ff8200882024fa9639f31ff8a56561793cd 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,4 @@
 pyyaml
 jinja2
 mistune
+python-dateutil