diff --git a/bin/install.sh b/bin/install.sh
index b9d34ad..d06f9fc 100644
--- a/bin/install.sh
+++ b/bin/install.sh
@@ -175,10 +175,6 @@ install_packages() {
     echo "更新源列表失败" >&2
     exit 1
   fi
-  if ! sudo apt-get upgrade -y; then
-    echo "系统更新失败" >&2
-    exit 1
-  fi
   if ! sudo apt-get install -y git pigpio netcat* gawk python3-dev python3-pip python3-pil python3-numpy python3-gpiozero python3-pigpio build-essential; then
     echo "软件包安装失败" >&2
     exit 1