diff --git a/agenda/holidays.py b/agenda/holidays.py
index a93ec5d..6f18765 100644
--- a/agenda/holidays.py
+++ b/agenda/holidays.py
@@ -156,24 +156,7 @@ def get_all(last_year: date, next_year: date, data_dir: str) -> list[Holiday]:
     bank_holidays = agenda.uk_holiday.bank_holiday_list(last_year, next_year, data_dir)
 
     holiday_list: list[Holiday] = bank_holidays + us_hols
-    for country in (
-        "at",
-        "be",
-        "br",
-        "ch",
-        "cz",
-        "de",
-        "dk",
-        "ee",
-        "es",
-        "fi",
-        "fr",
-        "gr",
-        "it",
-        "ke",
-        "nl",
-        "pl",
-    ):
+    for country in flask.current_app.config["HOLIDAY_COUNTRIES"]:
         holiday_list += get_holidays(country, last_year, next_year)
 
     return holiday_list