diff --git a/src/ntqqapi/api/group.ts b/src/ntqqapi/api/group.ts
index 711306f..38603d5 100644
--- a/src/ntqqapi/api/group.ts
+++ b/src/ntqqapi/api/group.ts
@@ -76,30 +76,29 @@ export class NTQQGroupApi extends Service {
   async getGroupMember(groupCode: string | number, memberUinOrUid: string | number) {
     const groupCodeStr = groupCode.toString()
     const memberUinOrUidStr = memberUinOrUid.toString()
-    let members = this.groupMembers.get(groupCodeStr)
-    if (!members) {
+    if (!this.groupMembers.has(groupCodeStr)) {
       try {
-        members = await this.getGroupMembers(groupCodeStr)
         // 更新群成员列表
-        this.groupMembers.set(groupCodeStr, members)
+        this.groupMembers.set(groupCodeStr, await this.getGroupMembers(groupCodeStr))
       }
       catch (e) {
         return null
       }
     }
+    let members = this.groupMembers.get(groupCodeStr)!
     const getMember = () => {
       let member: GroupMember | undefined = undefined
       if (isNumeric(memberUinOrUidStr)) {
-        member = Array.from(members!.values()).find(member => member.uin === memberUinOrUidStr)
+        member = Array.from(members.values()).find(member => member.uin === memberUinOrUidStr)
       } else {
-        member = members!.get(memberUinOrUidStr)
+        member = members.get(memberUinOrUidStr)
       }
       return member
     }
     let member = getMember()
     if (!member) {
-      members = await this.getGroupMembers(groupCodeStr)
-      this.groupMembers.set(groupCodeStr, members)
+      this.groupMembers.set(groupCodeStr, await this.getGroupMembers(groupCodeStr))
+      members = this.groupMembers.get(groupCodeStr)!
       member = getMember()
     }
     return member
diff --git a/src/onebot11/adapter.ts b/src/onebot11/adapter.ts
index c082206..adfa932 100644
--- a/src/onebot11/adapter.ts
+++ b/src/onebot11/adapter.ts
@@ -356,12 +356,12 @@ class OneBot11Adapter extends Service {
     for (const member of members) {
       const existMember = await this.ctx.ntGroupApi.getGroupMember(groupCode, member.uin)
       if (existMember) {
-        if (member.cardName != existMember.cardName) {
+        if (member.cardName !== existMember.cardName) {
           this.ctx.logger.info('群成员名片变动', `${groupCode}: ${existMember.uin}`, existMember.cardName, '->', member.cardName)
           this.dispatch(
             new OB11GroupCardEvent(parseInt(groupCode), parseInt(member.uin), member.cardName, existMember.cardName),
           )
-        } else if (member.role != existMember.role) {
+        } else if (member.role !== existMember.role) {
           this.ctx.logger.info('有管理员变动通知')
           const groupAdminNoticeEvent = new OB11GroupAdminNoticeEvent(
             member.role == GroupMemberRole.admin ? 'set' : 'unset',