diff --git a/setup.py b/setup.py
index 514fdab..a053fe6 100644
--- a/setup.py
+++ b/setup.py
@@ -51,7 +51,9 @@
             padding._ffi.verifier.get_extension()
         ]
         if Binding.is_available():
-            self.distribution.ext_modules.append(Binding().ffi.verifier.get_extension())
+            self.distribution.ext_modules.append(
+                Binding().ffi.verifier.get_extension()
+            )
 
         build.finalize_options(self)