diff --git a/plot_serializer/matplotlib/serializer.py b/plot_serializer/matplotlib/serializer.py
index 6876f41de7d18aabb65dfe452b5b53b07a612411..9ea74cf1303bccd4a55fe3a1f306d24e623f97d7 100644
--- a/plot_serializer/matplotlib/serializer.py
+++ b/plot_serializer/matplotlib/serializer.py
@@ -1159,7 +1159,7 @@ class MatplotlibSerializer(Serializer):
         self,
         *args: Any,
         **kwargs: Any,
-    ) -> Tuple[MplFigure, Union[MplAxes, MplAxes3D, _AxesProxy, _AxesProxy3D, Any]]:
+    ) -> Tuple[MplFigure, Union[MplAxes, MplAxes3D, Any]]:
         figure, axes = matplotlib.pyplot.subplots(*args, **kwargs)
 
         new_axes: Any