diff --git a/pina/optimizer.py b/pina/optimizer.py
index d400e82..08631e6 100644
--- a/pina/optimizer.py
+++ b/pina/optimizer.py
@@ -18,4 +18,4 @@ class TorchOptimizer(Optimizer):
     def hook(self, parameters):
         self.optimizer_instance = self.optimizer_class(
             parameters, **self.kwargs
-        )
+        )
\ No newline at end of file