diff --git a/requirements.txt b/requirements.txt
index f60acb3..7ddfb72 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,10 +2,12 @@ blinker==1.7.0
 click==8.1.7
 Flask==3.0.0
 Flask-WTF==1.2.1
+gunicorn==21.2.0
 icalendar==5.0.11
 itsdangerous==2.1.2
 Jinja2==3.1.2
 MarkupSafe==2.1.3
+packaging==23.2
 python-dateutil==2.8.2
 pytz==2023.3.post1
 six==1.16.0