diff --git a/api/requirements.txt b/api/requirements.txt
index 4554304..8a009e1 100644
--- a/api/requirements.txt
+++ b/api/requirements.txt
@@ -11,6 +11,7 @@ lazy-object-proxy==1.4.3
 MarkupSafe==1.1.1
 mccabe==0.6.1
 pylint==2.5.3
+python-dateutil==2.8.1
 pytz==2020.1
 six==1.15.0
 toml==0.10.1