diff --git a/main.py b/main.py
index 0617727271..4de80152c6 100644
--- a/main.py
+++ b/main.py
@@ -187,7 +187,7 @@ def auto_opentab_delay():
         def open():
             time.sleep(2)       # 打开浏览器
             DARK_MODE, = get_conf('DARK_MODE')
-            if DARK_MODE: webbrowser.open_new_tab(f"http://localhost:{PORT}/?__dark-theme=true")
+            if DARK_MODE: webbrowser.open_new_tab(f"http://localhost:{PORT}/?__theme=dark")
             else: webbrowser.open_new_tab(f"http://localhost:{PORT}")
         threading.Thread(target=open, name="open-browser", daemon=True).start()
         threading.Thread(target=auto_update, name="self-upgrade", daemon=True).start()