Update app.py

app.py

@@ -565,7 +565,7 @@ with gr.Blocks(css=css) as demo:
                     visible = False
                     is_visible.append(gr.State(value=False))
 
-                file_collection.append(gr.File(label=f'''Upload the images for your {ordinal(x+1) if (x>0) else ""} concept''', file_count="multiple", interactive=True, visible=visible))
+                file_collection.append(gr.File(file_types=["image"], label=f'''Upload the images for your {ordinal(x+1) if (x>0) else ""} concept''', file_count="multiple", interactive=True, visible=visible))
                 with gr.Column(visible=visible) as row[x]:
                     concept_collection.append(gr.Textbox(label=f'''{ordinal(x+1) if (x>0) else ""} concept prompt - use a unique, made up word to avoid collisions'''))  
                     with gr.Row():