diff --git a/yoga/image/encoders/png.py b/yoga/image/encoders/png.py
index 7678b3c..8dc92cf 100644
--- a/yoga/image/encoders/png.py
+++ b/yoga/image/encoders/png.py
@@ -177,9 +177,11 @@ def clean_png(data):
     chunks.append(
         {
             "type": "IDAT",
-            "data": idat_zopfli
-            if len(idat_zopfli) <= len(idat_concat)
-            else idat_concat,
+            "data": (
+                idat_zopfli
+                if len(idat_zopfli) <= len(idat_concat)
+                else idat_concat
+            ),
         }
     )
 
diff --git a/yoga/model/assimp.py b/yoga/model/assimp.py
index 7e79d0d..7a0527f 100644
--- a/yoga/model/assimp.py
+++ b/yoga/model/assimp.py
@@ -2,7 +2,6 @@
 This module contains functions binded from the Assimp C++ API.
 """
 
-
 from ._assimp import lib, ffi