diff --git a/chatmastermind/main.py b/chatmastermind/main.py
index 9c8c3c5..b1db2d6 100755
--- a/chatmastermind/main.py
+++ b/chatmastermind/main.py
@@ -81,12 +81,6 @@ def ask_cmd(args: argparse.Namespace, config: dict) -> None:
     """
     Handler for the 'ask' command.
     """
-    if args.max_tokens:
-        config['openai']['max_tokens'] = args.max_tokens
-    if args.temperature:
-        config['openai']['temperature'] = args.temperature
-    if args.model:
-        config['openai']['model'] = args.model
     chat, question, tags = create_question_with_hist(args, config)
     print_chat_hist(chat, False, args.only_source_code)
     otags = args.output_tags or []
@@ -137,8 +131,8 @@ def create_parser() -> argparse.ArgumentParser:
     # subcommand-parser
     cmdparser = parser.add_subparsers(dest='command',
                                       title='commands',
-                                      description='supported commands')
-    cmdparser.required = True
+                                      description='supported commands',
+                                      required=True)
 
     # a parent parser for all commands that support tag selection
     tag_parser = argparse.ArgumentParser(add_help=False)
@@ -214,9 +208,16 @@ def main() -> int:
     parser = create_parser()
     args = parser.parse_args()
     command = parser.parse_args()
-
     config = read_config(args.config)
+
+    # modify config according to args
     openai_api_key(config['openai']['api_key'])
+    if args.max_tokens:
+        config['openai']['max_tokens'] = args.max_tokens
+    if args.temperature:
+        config['openai']['temperature'] = args.temperature
+    if args.model:
+        config['openai']['model'] = args.model
 
     command.func(command, config)