diff --git a/web/src/lib/billing-client.ts b/web/src/lib/billing-client.ts
index bb4b26c..7ff0cd1 100644
--- a/web/src/lib/billing-client.ts
+++ b/web/src/lib/billing-client.ts
@@ -17,7 +17,7 @@ let _client: ReturnType<typeof createSubscriptionClient> | null = null;
 function getClient() {
   if (!_client) {
     _client = createSubscriptionClient({
-      baseUrl: getBaseUrl(),
+      baseUrl: `${getBaseUrl()}/api`,
       productId: PRODUCT_ID,
       userId: 'me',
       getAccessToken: () => getAuthClient().getAccessToken() ?? '',