diff --git a/src/web/web/settings.py b/src/web/web/settings.py
index b507056..de91566 100644
--- a/src/web/web/settings.py
+++ b/src/web/web/settings.py
@@ -108,7 +108,7 @@ AUTH_PASSWORD_VALIDATORS = [
 
 LANGUAGE_CODE = "en-us"
 
-TIME_ZONE = os.environ["TZ"]
+TIME_ZONE = os.environ.get("TZ", "UTC")
 
 USE_I18N = True