diff --git a/src/escpos/cli.py b/src/escpos/cli.py
index 7fb5a5e..02d3c04 100644
--- a/src/escpos/cli.py
+++ b/src/escpos/cli.py
@@ -9,9 +9,9 @@ It requires you to have a configuration file. See documentation for details.
 
 """
 
-
 import argparse
 import platform
+from typing import Any
 
 try:
     import argcomplete
@@ -95,7 +95,7 @@ DEMO_FUNCTIONS = {
 # parser: A dict of args for command_parsers.add_parser
 # defaults: A dict of args for subparser.set_defaults
 # arguments: A list of dicts of args for subparser.add_argument
-ESCPOS_COMMANDS = [
+ESCPOS_COMMANDS: list[dict[str, Any]] = [
     {
         "parser": {
             "name": "qr",