diff --git a/unicorespawner/spawner.py b/unicorespawner/spawner.py
index dde408fba8d9a64aa570baf847971af3c8b51648..3a660d8ea2842494c741f53bfc17a976fbcb7bc1 100644
--- a/unicorespawner/spawner.py
+++ b/unicorespawner/spawner.py
@@ -297,7 +297,7 @@ class UnicoreSpawner(ForwardBaseSpawner):
             bss_notification_config = self.bss_notification_config
         return bss_notification_config
 
-    store_environment_in_file = Boolean(
+    store_environment_in_file = Bool(
         config=True,
         default_value=False,
         help="""