diff --git a/dictation_server/src/gateways/adb2c/adb2c.service.ts b/dictation_server/src/gateways/adb2c/adb2c.service.ts
index 6997ee9..69bd890 100644
--- a/dictation_server/src/gateways/adb2c/adb2c.service.ts
+++ b/dictation_server/src/gateways/adb2c/adb2c.service.ts
@@ -197,7 +197,10 @@ export class AdB2cService {
       }
 
       // キャッシュ上に存在していなければ、ADB2Cから取得してキャッシュに保存する
-      const user = await this.graphClient.api(`users/${externalId}`).get();
+      const user = await this.graphClient
+        .api(`users/${externalId}`)
+        .select(['id', 'displayName', 'identities'])
+        .get();
       await this.redisService.set(key, user, this.ttl);
       this.logger.log(`[ADB2C GET] externalId: ${externalId}`);