diff --git a/lib/providers/dingtalk.js b/lib/providers/dingtalk.js
index 41ed35f..e8d9f14 100644
--- a/lib/providers/dingtalk.js
+++ b/lib/providers/dingtalk.js
@@ -94,7 +94,13 @@ async function fetchAllDepartments() {
     }
     log.info('Got', deps.department.length, 'departments');
 
-    const depsMap = {};
+    const depsMap = {
+      '1': {
+        name: 'Staff',
+        id: 1,
+        parentid: null,
+      },
+    };
     deps.department.forEach(d => {
       d.name = d.name.replace(/ \/ /g, ' - ').replace(/\//g, '&').trim();
       depsMap[d.id] = d;
@@ -110,7 +116,7 @@ async function fetchAllDepartments() {
   allDeps.forEach(d => {
     let obj = d;
     let dn = [ `ou=${obj.name}` ];
-    while (obj.parentid !== 1) {
+    while (obj.parentid) {
       obj = depsMap[obj.parentid];
       dn.push(`ou=${obj.name}`);
     }
@@ -216,7 +222,7 @@ async function reloadFromDingtalkServer() {
   });
 
   Object.values(allDepartmentsMap).forEach(dep => {
-    if (dep.parentid != 1) {
+    if (dep.parentid) {
       const parentDep = allDepartmentsMap[dep.parentid];
       addMemberToGroup(allLDAPGroupsMap[dep.id], allLDAPGroupsMap[parentDep.id]);
     }
@@ -260,7 +266,7 @@ async function reloadFromDingtalkServer() {
     u.department.forEach(depId => {
       let parentDep = allDepartmentsMap[depId];
       // allLDAPGroupsMap[parentDep.id].attributes.member.push(personEntry.dn);
-      while (parentDep && parentDep.id !== 1) {
+      while (parentDep && parentDep.id) {
         addMemberToGroup(personEntry, allLDAPGroupsMap[parentDep.id]);
         // console.log('add member', personEntry.attributes.cn, 'to', allLDAPGroupsMap[parentDep.id].attributes.cn);
         parentDep = allDepartmentsMap[parentDep.parentid];