diff --git a/pina/model/layers/orthogonal.py b/pina/model/layers/orthogonal.py
index b7085e0..0edcace 100644
--- a/pina/model/layers/orthogonal.py
+++ b/pina/model/layers/orthogonal.py
@@ -37,12 +37,12 @@ class OrthogonalBlock(torch.nn.Module):
             )
 
         result = torch.zeros_like(X)
-        
+
         # normalize first basis
         X_0 = torch.select(X, self.dim, 0)
         result_0 = torch.select(result, self.dim, 0)
         result_0 += X_0 / torch.norm(X_0)
-        
+
         # iterate over the rest of the basis with Gram-Schmidt
         for i in range(1, X.shape[self.dim]):
             v = torch.select(X, self.dim, i)
@@ -54,5 +54,5 @@ class OrthogonalBlock(torch.nn.Module):
                 ) * torch.select(result, self.dim, j)
             result_i = torch.select(result, self.dim, i)
             result_i += v / torch.norm(v)
-            
+
         return result