diff --git a/workspace/sources.sh b/workspace/sources.sh
index eef0670..6ad796b 100755
--- a/workspace/sources.sh
+++ b/workspace/sources.sh
@@ -8,76 +8,76 @@ if type "tee" 2>/dev/null && [ -n "${UBUNTU_SOURCE}" ]; then
     case "${UBUNTU_SOURCE}" in
         "aliyun")
             tee ${SOURCE_PATH} <<-'EOF'
-deb http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse
-deb http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse
-deb http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse
-deb http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse
-deb http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse
-deb-src http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse
-deb-src http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse
-deb-src http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse
-deb-src http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse
-deb-src http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse
+deb http://mirrors.aliyun.com/ubuntu/ focal main restricted universe multiverse
+deb http://mirrors.aliyun.com/ubuntu/ focal-security main restricted universe multiverse
+deb http://mirrors.aliyun.com/ubuntu/ focal-updates main restricted universe multiverse
+deb http://mirrors.aliyun.com/ubuntu/ focal-proposed main restricted universe multiverse
+deb http://mirrors.aliyun.com/ubuntu/ focal-backports main restricted universe multiverse
+deb-src http://mirrors.aliyun.com/ubuntu/ focal main restricted universe multiverse
+deb-src http://mirrors.aliyun.com/ubuntu/ focal-security main restricted universe multiverse
+deb-src http://mirrors.aliyun.com/ubuntu/ focal-updates main restricted universe multiverse
+deb-src http://mirrors.aliyun.com/ubuntu/ focal-proposed main restricted universe multiverse
+deb-src http://mirrors.aliyun.com/ubuntu/ focal-backports main restricted universe multiverse
 EOF
 ;;
         "zju")
             tee ${SOURCE_PATH} <<-'EOF'
-deb http://mirrors.zju.edu.cn/ubuntu/ bionic main multiverse restricted universe
-deb http://mirrors.zju.edu.cn/ubuntu/ bionic-backports main multiverse restricted universe
-deb http://mirrors.zju.edu.cn/ubuntu/ bionic-proposed main multiverse restricted universe
-deb http://mirrors.zju.edu.cn/ubuntu/ bionic-security main multiverse restricted universe
-deb http://mirrors.zju.edu.cn/ubuntu/ bionic-updates main multiverse restricted universe
-deb-src http://mirrors.zju.edu.cn/ubuntu/ bionic main multiverse restricted universe
-deb-src http://mirrors.zju.edu.cn/ubuntu/ bionic-backports main multiverse restricted universe
-deb-src http://mirrors.zju.edu.cn/ubuntu/ bionic-proposed main multiverse restricted universe
-deb-src http://mirrors.zju.edu.cn/ubuntu/ bionic-security main multiverse restricted universe
-deb-src http://mirrors.zju.edu.cn/ubuntu/ bionic-updates main multiverse restricted universe
+deb http://mirrors.zju.edu.cn/ubuntu/ focal main multiverse restricted universe
+deb http://mirrors.zju.edu.cn/ubuntu/ focal-backports main multiverse restricted universe
+deb http://mirrors.zju.edu.cn/ubuntu/ focal-proposed main multiverse restricted universe
+deb http://mirrors.zju.edu.cn/ubuntu/ focal-security main multiverse restricted universe
+deb http://mirrors.zju.edu.cn/ubuntu/ focal-updates main multiverse restricted universe
+deb-src http://mirrors.zju.edu.cn/ubuntu/ focal main multiverse restricted universe
+deb-src http://mirrors.zju.edu.cn/ubuntu/ focal-backports main multiverse restricted universe
+deb-src http://mirrors.zju.edu.cn/ubuntu/ focal-proposed main multiverse restricted universe
+deb-src http://mirrors.zju.edu.cn/ubuntu/ focal-security main multiverse restricted universe
+deb-src http://mirrors.zju.edu.cn/ubuntu/ focal-updates main multiverse restricted universe
 EOF
 ;;
         "tsinghua")
             tee ${SOURCE_PATH} <<-'EOF'
-deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic main restricted universe multiverse
-deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic main restricted universe multiverse
-deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-updates main restricted universe multiverse
-deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-updates main restricted universe multiverse
-deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-backports main restricted universe multiverse
-deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-backports main restricted universe multiverse
-deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-security main restricted universe multiverse
-deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-security main restricted universe multiverse
-deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-proposed main restricted universe multiverse
-deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-proposed main restricted universe multiverse
+deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal main restricted universe multiverse
+deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal main restricted universe multiverse
+deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-updates main restricted universe multiverse
+deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-updates main restricted universe multiverse
+deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-backports main restricted universe multiverse
+deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-backports main restricted universe multiverse
+deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-security main restricted universe multiverse
+deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-security main restricted universe multiverse
+deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-proposed main restricted universe multiverse
+deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-proposed main restricted universe multiverse
 EOF
 ;;
         "163")
             tee ${SOURCE_PATH} <<-'EOF'
-deb http://mirrors.163.com/ubuntu/ bionic main restricted universe multiverse
-deb http://mirrors.163.com/ubuntu/ bionic-security main restricted universe multiverse
-deb http://mirrors.163.com/ubuntu/ bionic-updates main restricted universe multiverse
-deb http://mirrors.163.com/ubuntu/ bionic-proposed main restricted universe multiverse
-deb http://mirrors.163.com/ubuntu/ bionic-backports main restricted universe multiverse
-deb-src http://mirrors.163.com/ubuntu/ bionic main restricted universe multiverse
-deb-src http://mirrors.163.com/ubuntu/ bionic-security main restricted universe multiverse
-deb-src http://mirrors.163.com/ubuntu/ bionic-updates main restricted universe multiverse
-deb-src http://mirrors.163.com/ubuntu/ bionic-proposed main restricted universe multiverse
-deb-src http://mirrors.163.com/ubuntu/ bionic-backports main restricted universe multiverse
+deb http://mirrors.163.com/ubuntu/ focal main restricted universe multiverse
+deb http://mirrors.163.com/ubuntu/ focal-security main restricted universe multiverse
+deb http://mirrors.163.com/ubuntu/ focal-updates main restricted universe multiverse
+deb http://mirrors.163.com/ubuntu/ focal-proposed main restricted universe multiverse
+deb http://mirrors.163.com/ubuntu/ focal-backports main restricted universe multiverse
+deb-src http://mirrors.163.com/ubuntu/ focal main restricted universe multiverse
+deb-src http://mirrors.163.com/ubuntu/ focal-security main restricted universe multiverse
+deb-src http://mirrors.163.com/ubuntu/ focal-updates main restricted universe multiverse
+deb-src http://mirrors.163.com/ubuntu/ focal-proposed main restricted universe multiverse
+deb-src http://mirrors.163.com/ubuntu/ focal-backports main restricted universe multiverse
 EOF
 ;;
         "ustc")
             tee ${SOURCE_PATH} <<-'EOF'
-deb https://mirrors.ustc.edu.cn/ubuntu/ bionic main restricted universe multiverse
-deb-src https://mirrors.ustc.edu.cn/ubuntu/ bionic main restricted universe multiverse
-deb https://mirrors.ustc.edu.cn/ubuntu/ bionic-updates main restricted universe multiverse
-deb-src https://mirrors.ustc.edu.cn/ubuntu/ bionic-updates main restricted universe multiverse
-deb https://mirrors.ustc.edu.cn/ubuntu/ bionic-backports main restricted universe multiverse
-deb-src https://mirrors.ustc.edu.cn/ubuntu/ bionic-backports main restricted universe multiverse
-deb https://mirrors.ustc.edu.cn/ubuntu/ bionic-security main restricted universe multiverse
-deb-src https://mirrors.ustc.edu.cn/ubuntu/ bionic-security main restricted universe multiverse
-deb https://mirrors.ustc.edu.cn/ubuntu/ bionic-proposed main restricted universe multiverse
-deb-src https://mirrors.ustc.edu.cn/ubuntu/ bionic-proposed main restricted universe multiverse
+deb https://mirrors.ustc.edu.cn/ubuntu/ focal main restricted universe multiverse
+deb-src https://mirrors.ustc.edu.cn/ubuntu/ focal main restricted universe multiverse
+deb https://mirrors.ustc.edu.cn/ubuntu/ focal-updates main restricted universe multiverse
+deb-src https://mirrors.ustc.edu.cn/ubuntu/ focal-updates main restricted universe multiverse
+deb https://mirrors.ustc.edu.cn/ubuntu/ focal-backports main restricted universe multiverse
+deb-src https://mirrors.ustc.edu.cn/ubuntu/ focal-backports main restricted universe multiverse
+deb https://mirrors.ustc.edu.cn/ubuntu/ focal-security main restricted universe multiverse
+deb-src https://mirrors.ustc.edu.cn/ubuntu/ focal-security main restricted universe multiverse
+deb https://mirrors.ustc.edu.cn/ubuntu/ focal-proposed main restricted universe multiverse
+deb-src https://mirrors.ustc.edu.cn/ubuntu/ focal-proposed main restricted universe multiverse
 EOF
 ;;
         *)
             echo "Please check whether there is aliyun|zju|tsinghua|163|ustc in the parameter"
             exit 1;;
     esac
-fi
\ No newline at end of file
+fi