diff --git a/server/index.js b/server/index.js
index 7442cad..a1729ff 100644
--- a/server/index.js
+++ b/server/index.js
@@ -1322,7 +1322,7 @@ const server = http.createServer(async (req, res) => {
             const email = typeof rawEmail === 'string' ? rawEmail.trim().toLowerCase() : '';
             const rawPlanId = o.metadata?.planId;
             const candidatePlan = typeof rawPlanId === 'string' ? rawPlanId.trim() : '';
-            const planId = ['pro', 'kurumsal'].includes(candidatePlan) ? candidatePlan : 'pro';
+            const planId = ['pro', 'kurumsal'].includes(candidatePlan) ? candidatePlan : 'ucretsiz';
             if (email) {
               store.setPlan(email, {
                 plan: planId, kaynak: 'stripe',