diff --git a/src/waybar_check_gmail/config/config.py b/src/waybar_check_gmail/config/config.py
index ede2c24..e1f30e5 100644
--- a/src/waybar_check_gmail/config/config.py
+++ b/src/waybar_check_gmail/config/config.py
@@ -70,7 +70,7 @@ def __init__(self, fn: AnyPath):
             for key, val in config.items(sec):
                 if key not in self._map[sec]:
                     die("Unexpected config key in section {}: {}".format(sec, key))
-                if self._map[sec][key] is bool:
+                if isinstance(self._map[sec][key], bool):
                     self._map[sec][key] = config.getboolean(sec, key)
                 else:
                     self._map[sec][key] = val