diff --git a/requirements.txt b/requirements.txt
index 043f37c..b76fb58 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -10,3 +10,4 @@ pytest>=7.0.0
 pytest-asyncio>=0.21.0
 pywebpush>=1.14.0
 numpy>=1.26.0
+pytz