diff --git a/environment.mjs b/environment.mjs
new file mode 100644
index 0000000..00b9456
--- /dev/null
+++ b/environment.mjs
@@ -0,0 +1,3 @@
+const isProd = process.env.NODE_ENV === 'production';
+const basePath = isProd ? '/klimadashboard-ka' : '';
+export default basePath
\ No newline at end of file
diff --git a/next.config.js b/next.config.mjs
similarity index 55%
rename from next.config.js
rename to next.config.mjs
index 7121412..c187ca3 100644
--- a/next.config.js
+++ b/next.config.mjs
@@ -1,11 +1,9 @@
 /** @type {import('next').NextConfig} */
-
-const isProd = process.env.NODE_ENV === 'production';
-export const basePath = isProd ? '/klimadashboard-ka' : '';
+import basePath from "./environment.mjs"
 
 const nextConfig = {
     output: 'export',
-    basePath,
+    basePath: basePath,
 
     images: {
         unoptimized: true
diff --git a/package.json b/package.json
index 4e8a755..497225e 100644
--- a/package.json
+++ b/package.json
@@ -2,7 +2,6 @@
   "name": "klimadashboard-ka",
   "version": "0.1.0",
   "private": true,
-  "type": "module",
   "scripts": {
     "dev": "next dev",
     "build": "cross-env NODE_ENV=production next build",
diff --git a/src/app/data.ts b/src/app/data.ts
index 495ed69..3d7f050 100644
--- a/src/app/data.ts
+++ b/src/app/data.ts
@@ -2,7 +2,7 @@
 
 import useSWR from "swr";
 import {FeinstaubDataEntry, GreenHouseGasEntry, SensorDataEntryJSON} from "@/app/api/models";
-import {basePath} from "../../next.config";
+import basePath from "../../environment.mjs";
 
 const fetcher = (input: URL | RequestInfo, init?: RequestInit | undefined) => fetch(input, init).then((res) => res.json());