diff --git a/requirements.txt b/requirements.txt
index 71e07cd..16986f7 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,5 +5,6 @@ click==8.1.8
 itsdangerous==2.2.0
 MarkupSafe==3.0.3
 pdfplumber==0.11.8
+python-dateutil
 requests
 gunicorn