diff --git a/init.sh b/init.sh
index 735440f..761a5b9 100755
--- a/init.sh
+++ b/init.sh
@@ -117,6 +117,7 @@ usage(){
     echo "            2             xjtu"
     echo "            3             nju"
     echo "            4             tsinghua"
+    echo "            *             official"
 }
 
 PKG_BASE="$SCRIPTPATH/packages-base"