diff --git a/backend/requirements.txt b/backend/requirements.txt
index 39ca288..de77c9a 100644
--- a/backend/requirements.txt
+++ b/backend/requirements.txt
@@ -7,5 +7,6 @@ httpx>=0.27.0
 python-multipart>=0.0.9
 python-jose[cryptography]>=3.3.0
 openpyxl>=3.1.2
+tzdata>=2024.1
 pytest>=8.0.0
 pytest-asyncio>=0.24.0