diff --git a/start.sh b/start.sh
index 3b1e0c5..a1e3c60 100644
--- a/start.sh
+++ b/start.sh
@@ -26,7 +26,7 @@ python3 -c "import OCC; print('✅ PythonOCC可用')" || {
 
 # 检查是否已经安装依赖
 echo "📦 检查依赖包..."
-pip install -r requirements.txt
+pip install --upgrade -r requirements.txt
 
 # 创建必要目录
 echo "📁 创建必要目录..."