diff --git a/tutorial.ipynb b/tutorial.ipynb
index c5c9efc..60e9c16 100644
--- a/tutorial.ipynb
+++ b/tutorial.ipynb
@@ -52,7 +52,7 @@
     "# conda activate ow # 激活虚拟环境\n",
     "!git clone https://gitee.com/CV_Lab/opencv_webcam.git  # clone\n",
     "%cd opencv_webcam\n",
-    "%pip install -qr requirements.txt  # install"
+    "%pip install -qr requirements.txt -U  # install"
    ]
   },
   {