diff --git a/src/debian/debian_dns_smartdns_plugin.conf b/src/debian/debian_dns_smartdns_plugin.conf
index 6803690..4f0a171 100644
--- a/src/debian/debian_dns_smartdns_plugin.conf
+++ b/src/debian/debian_dns_smartdns_plugin.conf
@@ -2,9 +2,9 @@
 set -e
 
 WORKDIR="$(mktemp -d)"
-CONFIG_DIR="/etc/smartdns.d"
+CONFDIR="/etc/smartdns.d"
 SERVERS=(223.5.5.5 119.29.29.29 114.114.114.114 114.114.115.115)
-SERVERS_GROUP=(accelerate)
+GROUP=(accelerate)
 # Others: 223.6.6.6 119.28.28.28
 # Not using best possible CDN pop: 1.2.4.8 210.2.4.8
 # Broken?: 180.76.76.76
@@ -14,8 +14,8 @@ CONF_WITH_GROUP=(server-group.china)
 CONF_SIMPLE=(bogus-nxdomain.china)
 
 echo "Checking whether the configuration folder exists..."
-if [ ! -d "$CONFIG_DIR" ]; then
-  mkdir -p "$CONFIG_DIR"
+if [ ! -d "$CONFDIR" ]; then
+  mkdir -p "$CONFDIR"
 fi
 
 echo "Downloading latest configurations..."
@@ -30,27 +30,27 @@ git clone --depth=1 https://gitee.com/felixonmars/dnsmasq-china-list.git "$WORKD
 
 echo "Removing old configurations..."
 for _conf in "${CONF_WITH_SERVERS[@]}" "${CONF_WITH_GROUP[@]}" "${CONF_SIMPLE[@]}"; do
-  rm -f "$CONFIG_DIR/$_conf"*.conf
+  rm -f "$CONFDIR/$_conf"*.conf
 done
 
 echo "Installing new configurations..."
 for _conf in "${CONF_WITH_SERVERS[@]}" "${CONF_WITH_GROUP[@]}" "${CONF_SIMPLE[@]}"; do
   if [[ "${CONF_WITH_SERVERS[@]}" =~ $_conf ]]; then
     sed -En 's|^server=/([^/]*)/114.114.114.114$|\1|p' "$WORKDIR/$_conf.conf" | grep -Ev '^#' > "$WORKDIR/$_conf.step1.raw"
-    sed -En "s/(.*)/nameserver \\/\\1\\/${SERVERS_GROUP[@]}/p" "$WORKDIR/$_conf.step1.raw" > "$WORKDIR/$_conf.step2.raw"
-    cp "$WORKDIR/$_conf.step2.raw" "$CONFIG_DIR/$_conf.${SERVERS_GROUP[@]}.conf"
+    sed -En "s/(.*)/nameserver \\/\\1\\/${GROUP[@]}/p" "$WORKDIR/$_conf.step1.raw" > "$WORKDIR/$_conf.step2.raw"
+    cp "$WORKDIR/$_conf.step2.raw" "$CONFDIR/$_conf.${GROUP[@]}.conf"
   fi
 
   if [[ "${CONF_WITH_GROUP[@]}" =~ $_conf ]]; then
     for _server in "${SERVERS[@]}"; do
-      echo "server $_server -group ${SERVERS_GROUP[@]} -exclude-default-group" >> "$WORKDIR/$_conf.raw"
+      echo "server $_server -group ${GROUP[@]} -exclude-default-group" >> "$WORKDIR/$_conf.raw"
     done
-    cp "$WORKDIR/$_conf.raw" "$CONFIG_DIR/${CONF_WITH_GROUP[@]}.${SERVERS_GROUP[@]}.conf"
+    cp "$WORKDIR/$_conf.raw" "$CONFDIR/${CONF_WITH_GROUP[@]}.${GROUP[@]}.conf"
   fi
 
   if [[ "${CONF_SIMPLE[@]}" =~ $_conf ]]; then
     sed -e "s|=| |" "$WORKDIR/$_conf.conf" > "$WORKDIR/$_conf.raw"
-    cp "$WORKDIR/$_conf.raw" "$CONFIG_DIR/$_conf.${SERVERS_GROUP[@]}.conf"
+    cp "$WORKDIR/$_conf.raw" "$CONFDIR/$_conf.${GROUP[@]}.conf"
   fi
 done