diff --git a/pyalapin/engine/__init__.py b/pyalapin/engine/__init__.py
index d3001ab..d517701 100644
--- a/pyalapin/engine/__init__.py
+++ b/pyalapin/engine/__init__.py
@@ -1 +1 @@
-from .engine import ChessGame
\ No newline at end of file
+from .engine import ChessGame
diff --git a/pyalapin/interface/__init__.py b/pyalapin/interface/__init__.py
index dd1cc2a..2c1926b 100644
--- a/pyalapin/interface/__init__.py
+++ b/pyalapin/interface/__init__.py
@@ -1 +1 @@
-from .interface import ChessApp, BoardInterface
\ No newline at end of file
+from .interface import ChessApp, BoardInterface
diff --git a/run_app.py b/run_app.py
index a0901b2..395e166 100644
--- a/run_app.py
+++ b/run_app.py
@@ -1,4 +1,5 @@
 from pyalapin.interface import ChessApp
+
 # import pyalapin.interface as interface
 
 if __name__ == "__main__":