diff --git a/Dockerfile b/Dockerfile
index 41f2df8..35360c8 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -27,7 +27,7 @@ COPY --from=builder /app/public ./public
 COPY --from=builder /app/server ./server
 COPY --from=deps /app/node_modules ./node_modules
 COPY --from=builder /app/package.json ./package.json
-COPY --from=builder /app/next.config.ts ./next.config.ts
+COPY --from=builder /app/next.config.mjs ./next.config.mjs
 
 EXPOSE 3000
 
diff --git a/next.config.ts b/next.config.mjs
similarity index 94%
rename from next.config.ts
rename to next.config.mjs
index c57dbda..76fa3dc 100644
--- a/next.config.ts
+++ b/next.config.mjs
@@ -1,5 +1,3 @@
-import type { NextConfig } from "next";
-
 const securityHeaders = [
   {
     key: "Content-Security-Policy",
@@ -48,7 +46,8 @@ if (process.env.NODE_ENV === "production") {
   });
 }
 
-const nextConfig: NextConfig = {
+/** @type {import('next').NextConfig} */
+const nextConfig = {
   async headers() {
     return [
       {