diff --git a/setup.py b/setup.py
index 3e324f747..1ab24e975 100644
--- a/setup.py
+++ b/setup.py
@@ -32,7 +32,11 @@
 
 def find_vendored_packages(path):
     """Add all the packages in the `vendor` directory"""
-    return [root.replace("/", ".") for root, dirs, files in os.walk(path) if "__pycache__" not in root]
+    return [
+        root.replace("/", ".")
+        for root, dirs, files in os.walk(path)
+        if "__pycache__" not in root
+    ]
 
 
 vendored_packages = find_vendored_packages("omegaconf/vendor")