diff --git a/src/cellmap_models/pytorch/cosem/load_model.py b/src/cellmap_models/pytorch/cosem/load_model.py
index 1857087..05f52df 100755
--- a/src/cellmap_models/pytorch/cosem/load_model.py
+++ b/src/cellmap_models/pytorch/cosem/load_model.py
@@ -250,9 +250,9 @@ def compute_minimal_shapes(self):
             ) * np.prod(self.downsample_factors[lv:], axis=0)
             min_output_shape -= total_pad
 
-        self.min_input_shape = min_input_shape
-        self.min_output_shape = min_output_shape
-        self.input_size_step = step
+        self.min_input_shape = [int(s) for s in min_input_shape]
+        self.min_output_shape = [int(s) for s in min_output_shape]
+        self.input_size_step = int(step)
 
     def round_to_valid_input_shape(self, shape=None, mode="grow"):
         """