diff --git a/backend/src/features/subscriptions/jobs/grace-period.job.ts b/backend/src/features/subscriptions/jobs/grace-period.job.ts
index 8e8553b..cd8117c 100644
--- a/backend/src/features/subscriptions/jobs/grace-period.job.ts
+++ b/backend/src/features/subscriptions/jobs/grace-period.job.ts
@@ -78,13 +78,13 @@ export async function processGracePeriodExpirations(): Promise<GracePeriodResult
 
         await client.query(updateQuery, [subscription.id]);
 
-        // Sync tier to user_profiles table
+        // Sync tier to user_profiles table (user_id is auth0_sub)
         const syncQuery = `
           UPDATE user_profiles
           SET
             subscription_tier = 'free',
             updated_at = NOW()
-          WHERE user_id = $1
+          WHERE auth0_sub = $1
         `;
 
         await client.query(syncQuery, [subscription.user_id]);