diff --git a/isc.py b/isc.py
index 8a5ee07..52dcfc5 100644
--- a/isc.py
+++ b/isc.py
@@ -130,7 +130,7 @@ class Isc(NNOperator):
                 path = path + '.onnx'
             else:
                 raise ValueError(f'Invalid format {format}.')
-        dummy_input = torch.rand(1, 3, 224, 224)
+        dummy_input = torch.rand(1, 3, 224, 224).to(self.device)
         if format == 'pytorch':
             torch.save(self._model, path)
         elif format == 'torchscript':