diff --git a/cibuildwheel/docker_container.py b/cibuildwheel/docker_container.py
index 02636061..8da13d7e 100644
--- a/cibuildwheel/docker_container.py
+++ b/cibuildwheel/docker_container.py
@@ -1,6 +1,6 @@
 import io
-import os
 import json
+import os
 import platform
 import shlex
 import shutil