diff --git a/server/src/routes/user-payments.js b/server/src/routes/user-payments.js
index 9d89bc4..643d661 100644
--- a/server/src/routes/user-payments.js
+++ b/server/src/routes/user-payments.js
@@ -49,7 +49,8 @@ export async function registerUserPaymentRoutes(fastify) {
     }
 
     const idempotencyKey = `${id}-${Date.now()}`
-    const returnUrl = `${process.env.CLIENT_PUBLIC_URL || 'http://127.0.0.1:5173'}/me/orders/${id}?paid=1`
+    const clientUrl = (process.env.CLIENT_PUBLIC_URL || 'http://127.0.0.1:5173').replace(/\/$/, '')
+    const returnUrl = `${clientUrl}/me/orders/${id}?paid=1`
     const clientIp = request.ip
 
     const amount = {