diff --git a/main/src/models/Pair.ts b/main/src/models/Pair.ts
index 82baf18..6d75343 100644
--- a/main/src/models/Pair.ts
+++ b/main/src/models/Pair.ts
@@ -48,7 +48,7 @@ export class Pair {
     const lastHash = avatarCache ? avatarCache.hash : null;
     const avatar = await getAvatar(this.qqRoomId);
     const newHash = md5(avatar);
-    if (!lastHash || lastHash.compare(newHash) !== 0) {
+    if (!lastHash || Buffer.from(lastHash).compare(newHash) !== 0) {
       log.debug(`更新群头像: ${this.qqRoomId}`);
       await this._tg.setProfilePhoto(avatar);
       await db.avatarCache.upsert({
diff --git a/main/src/models/TelegramSession.ts b/main/src/models/TelegramSession.ts
index 89be198..fc4487d 100644
--- a/main/src/models/TelegramSession.ts
+++ b/main/src/models/TelegramSession.ts
@@ -48,7 +48,7 @@ export default class TelegramSession extends MemorySession {
 
     if (authKey && typeof authKey === 'object') {
       this._authKey = new AuthKey();
-      await this._authKey.setKey(authKey);
+      await this._authKey.setKey(Buffer.from(authKey));
     }
     if (dcId) {
       this._dcId = dcId;