Update app.py

app.py

@@ -526,7 +526,7 @@ with gr.Blocks(css=css) as demo:
                             with gr.Row():
                                 with gr.Column(scale=1):
                                     xl_width = gr.Slider(label="Width", maximum=1024, minimum=640, value=1024, step=8)
-                                    xl_height = gr.Slider(label="Height", maximum=1024, minimum=0640, value=1024, step=8)
+                                    xl_height = gr.Slider(label="Height", maximum=1024, minimum=640, value=1024, step=8)
 
                                 with gr.Column(scale=1):
                                     xl_batch_size = gr.Slider(label="Batch Size", maximum=1, value=1)