diff --git a/example/trade_derivatives_en.ipynb b/example/trade_derivatives_en.ipynb
index 0b96baf..409a2e0 100644
--- a/example/trade_derivatives_en.ipynb
+++ b/example/trade_derivatives_en.ipynb
@@ -52,6 +52,7 @@
      "name": "#%%\n"
     }
    },
+   "outputs": [],
    "source": [
     "import okx.Trade as Trade"
    ]