diff --git a/tiramisu_cmdline_parser/api.py b/tiramisu_cmdline_parser/api.py
index c63337a..e8b8cf2 100644
--- a/tiramisu_cmdline_parser/api.py
+++ b/tiramisu_cmdline_parser/api.py
@@ -1,4 +1,4 @@
-# Copyright (C) 2018-2019 Team tiramisu (see AUTHORS for all contributors)
+# Copyright (C) 2018-2025 Team tiramisu (see AUTHORS for all contributors)
 #
 # This program is free software: you can redistribute it and/or modify it
 # under the terms of the GNU Lesser General Public License as published by the
@@ -29,18 +29,6 @@ from gettext import gettext as _
 from tiramisu import Config
 from tiramisu.error import PropertiesOptionError, LeadershipError, ConfigError
 
-# except ImportError:
-#    Config = None
-#    from tiramisu_api.error import PropertiesOptionError
-#    LeadershipError = ValueError
-try:
-    from tiramisu_api import Config as ConfigJson
-
-    if Config is None:
-        Config = ConfigJson
-except ImportError:
-    ConfigJson = Config
-
 
 def get_choice_list(config, properties, display):
     def convert(choice):
@@ -322,7 +310,7 @@ class _BuildKwargs:
 class TiramisuCmdlineParser(ArgumentParser):
     def __init__(
         self,
-        config: Union[Config, ConfigJson],
+        config: Config,
         *args,
         root: str = None,
         fullpath: bool = True,
@@ -340,6 +328,8 @@ class TiramisuCmdlineParser(ArgumentParser):
             unrestraint = True
         self.fullpath = fullpath
         self.config = config
+        config_properties = config.property.get()
+        self.config_frozen = "frozen" in config_properties or "everything_frozen" in config_properties
         self.root = root
         self.remove_empty_od = remove_empty_od
         self.unrestraint = unrestraint
@@ -462,7 +452,7 @@ class TiramisuCmdlineParser(ArgumentParser):
         obj = None
         for obj in config:
             # do not display frozen option
-            if "frozen" in obj.property.get():
+            if self.config_frozen and "frozen" in obj.property.get():
                 continue
             if obj.isoptiondescription():
                 if _forhelp: