added tzdata as a requirement as noted in the ZoneInfo docs:

The zoneinfo module does not directly provide time zone data, and instead pulls time zone information from the system time zone database or the first-party PyPI package tzdata, if available. Some systems, including notably Windows systems, do not have an IANA database available, and so for projects targeting cross-platform compatibility that require time zone data, it is recommended to declare a dependency on tzdata. If neither system data nor tzdata are available, all calls to ZoneInfo will raise ZoneInfoNotFoundError.

Author: Alejandro Casanovas

setup.py

@@ -32,7 +32,8 @@ def read(fname):
     'python-dateutil>=2.7',
     'tzlocal>=5.0',
     'beautifulsoup4>=4.0.0',
-    'stringcase>=1.2.0'
+    'stringcase>=1.2.0',
+    'tzdata>=2023.4'
 ]
 
 setup(