diff --git a/rwx/cmd/squashfs/__init__.py b/rwx/cmd/squashfs/__init__.py
index 637890a..4f793ca 100644
--- a/rwx/cmd/squashfs/__init__.py
+++ b/rwx/cmd/squashfs/__init__.py
@@ -1,14 +1,14 @@
 import ps
 import rwx.cmd
 
-rwx.cmd.need('mksquashfs')
+rwx.cmd.need("mksquashfs")
 
 
 def mksquashfs(input_root: str, output_file: str):
     ps.run([
-        'mksquashfs',
+        "mksquashfs",
         input_root,
         output_file,
-        '-comp', 'zstd',
-        '-Xcompression-level', str(18),
+        "-comp", "zstd",
+        "-Xcompression-level", str(18),
     ])