to gradio 4.42

app.py

@@ -66,12 +66,13 @@ gr.Interface(inference,
     type="value",
     value='2x',
     label='Resolution model')], 
-    gr.Image(type="pil", label="Output"),
+    gr.Image(type="pil", label="Output", format="png"),
     title=title,
     description=description,
     article=article,
     examples=[['groot.jpeg', "2x"]],
     allow_flagging='never',
     cache_examples=False,
+    delete_cache=(4000, 4000),
     ).queue(api_open=True).launch(show_error=True, show_api=True)