diff --git a/app/next.config.mjs b/app/next.config.mjs
index e5882cf..5aaef24 100644
--- a/app/next.config.mjs
+++ b/app/next.config.mjs
@@ -1,8 +1,9 @@
 // @ts-check
 
+/** @type {import("next").NextConfig} */
 export default {
   env: {
-    API_URI: process.env.API_URI,
+    API_URI: /** @type {string} */ (process.env.API_URI),
   },
   i18n: {
     locales: ["en-US"],