diff --git a/src/peakrdl/subcommand.py b/src/peakrdl/subcommand.py
index 799141c..fe2ec2b 100644
--- a/src/peakrdl/subcommand.py
+++ b/src/peakrdl/subcommand.py
@@ -1,8 +1,5 @@
 from typing import TYPE_CHECKING, Optional, List, Type
 import argparse
-import os
-import sys
-import shlex
 
 from systemrdl import RDLCompiler