diff --git a/.github/workflows/gitee_sync_dependencies.yml b/.github/workflows/gitee_sync_dependencies.yml
index ff1616c..f2a31cb 100644
--- a/.github/workflows/gitee_sync_dependencies.yml
+++ b/.github/workflows/gitee_sync_dependencies.yml
@@ -38,6 +38,23 @@ jobs:
         force_update: true  # 启用后，强制同步，即强制覆盖目的端仓库
         static_list: "antigen,zsh-syntax-highlighting,zsh-autosuggestions,zsh-completions"  # 静态同步列表，在此填写需要同步的仓库名称，可填写多个
         timeout: '600s'  # git超时设置，超时后会自动重试git操作
+  zdharma-continuum:
+    runs-on: ubuntu-20.04
+    steps:
+    - name: zdharma-continuum repos  # 名字随便起
+      uses: Yikun/hub-mirror-action@v1.2  # 使用Yikun/hub-mirror-action
+      with:
+        src: github/zdharma-continuum  # 源端账户名(github)
+        dst: gitee/dictxiong  # 目的端账户名(gitee)
+        dst_key: ${{ secrets.GITEE_PRIVATE_KEY }}  # SSH密钥对中的私钥
+        dst_token:  ${{ secrets.GITEE_TOKEN }}  # Gitee账户的私人令牌
+        src_account_type: org
+        dst_account_type: user  # 账户类型
+        clone_style: "https"  # 使用https方式进行clone，也可以使用ssh
+        debug: true  # 启用后会显示所有执行命令
+        force_update: true  # 启用后，强制同步，即强制覆盖目的端仓库
+        static_list: "fast-syntax-highlighting"  # 静态同步列表，在此填写需要同步的仓库名称，可填写多个
+        timeout: '600s'  # git超时设置，超时后会自动重试git操作
   tmux-mem-cpu-load:
     runs-on: ubuntu-20.04
     steps:
diff --git a/.zshrc2 b/.zshrc2
index 6a8759f..74bba80 100644
--- a/.zshrc2
+++ b/.zshrc2
@@ -22,7 +22,7 @@ if [[ "$DFS_NO_WALL" == "1" ]]; then
     ANTIGEN_URL="https://raw.githubusercontent.com/zsh-users/antigen/develop/bin/antigen.zsh"
     ANTIGEN_OMZ_REPO_URL="https://github.com/ohmyzsh/ohmyzsh.git"
     ANTIGEN_PLUGINS=(
-        "https://github.com/zsh-users/zsh-syntax-highlighting"
+        "https://github.com/zdharma-continuum/fast-syntax-highlighting"
         "https://github.com/zsh-users/zsh-completions"
         "https://github.com/zsh-users/zsh-autosuggestions"
     )
@@ -30,7 +30,7 @@ else
     ANTIGEN_URL="https://gitee.com/dictxiong/antigen/raw/develop/bin/antigen.zsh"
     ANTIGEN_OMZ_REPO_URL="https://gitee.com/dictxiong/ohmyzsh.git"
     ANTIGEN_PLUGINS=(
-        "https://gitee.com/dictxiong/zsh-syntax-highlighting"
+        "https://gitee.com/dictxiong/fast-syntax-highlighting"
         "https://gitee.com/dictxiong/zsh-completions"
         "https://gitee.com/dictxiong/zsh-autosuggestions"
     )
diff --git a/install.sh b/install.sh
index c155690..130f87f 100755
--- a/install.sh
+++ b/install.sh
@@ -197,6 +197,9 @@ install_crontab()
 {
     if [[ -x $(command -v crontab) ]]; then
         fmt_note "installing \"$CRON_JOB\" to crontab ..."
+        if ! crontab -l 1>/dev/null 2>&1; then
+            echo -n | crontab -
+        fi
         ( crontab -l | grep -vxF "${CRON_JOB}" | grep -v "no crontab for"; echo "$CRON_JOB" ) | crontab -
     else
         fmt_warning "crontab does not exist. skipping ..."
diff --git a/scripts/riot b/scripts/riot
index a742801..8b8c1b6 100755
--- a/scripts/riot
+++ b/scripts/riot
@@ -5,6 +5,19 @@ source "$THIS_DIR/../tools/common.sh"
 RIOT_TRUST_CLIENT=${RIOT_TRUST_CLIENT:-${DFS_TRUST:-0}}
 RIOT_TRUST_SERVER=${RIOT_TRUST_SERVER:-0}
 
+# check if port number valid
+check_port() {
+    ( echo $1 | grep -qxE "[1-9][0-9]{0,4}" ) || return 1
+    test $1 -lt 65536 -a $1 -gt 0 || return 1
+    return 0
+}
+
+# check if username valid
+check_username() {
+    ( echo $1 | grep -qxE "^[a-z][-a-z0-9_]*\$" ) || return 1
+    return 0
+}
+
 # get single server setting
 # may be called more than once
 get_server_meta() {
@@ -20,22 +33,24 @@ get_server_meta() {
     if [[ "$remote" == *@* ]]; then
         RET_USERNAME=${remote%%@*}
         remote=${remote#*@}
+        check_username $RET_USERNAME || fmt_fatal invalid username \"$RET_USERNAME\"
     fi
     # if in the form ...:22
-    if [[ "$remote" == *:* ]]; then
+    if [[ "$remote" == "["*"]":* || ( "$remote" != "["*"]" && "$remote" == *:* ) ]]; then
         RET_PORT=${remote##*:}
         remote=${remote%:*}
+        check_port $RET_PORT || fmt_fatal invalid port number \"$RET_PORT\"
     fi
     # presets -- match domain
     local domain=${remote##*.}
     local host=${remote%.*}
     # if there's no dot
-    if [[ "$host" == "$domain" ]]; then
+    if [[ "$host" == "$domain" && "$host" != "["*"]" ]]; then
         domain="ibd"
     fi
     case $domain in
-        ibd|ebd )
-            RET_HOSTNAME=$host.$domain.ink
+        i|ibd )
+            RET_HOSTNAME=$host.ibd.ink
             RET_PORT=${RET_PORT:-12022}
             RET_USERNAME=${RET_USERNAME:-root}
             RET_TRUST_SERVER=1
@@ -76,7 +91,7 @@ parse_remote() {
     local remote="$1"
     local jump_servers=""
     # loop for jump servers
-    while [[ -n $remote ]]; do 
+    while [[ -n $remote ]]; do
         local server=${remote%%,*}
         remote=${remote#*,}
         get_server_meta "$server"