diff --git a/src/services/auth.ts b/src/services/auth.ts
index 02dae0f..0bfa43b 100644
--- a/src/services/auth.ts
+++ b/src/services/auth.ts
@@ -121,6 +121,7 @@ export async function saveClientRegistration(
   await redisClient.set(
     CLIENT_REGISTRATION_KEY_PREFIX + clientId,
     JSON.stringify(registration),
+    options: { EX: REDIS_PENDING_AUTHORIZATION_EXPIRY_SEC },
   );
 }