diff --git a/lib/clouddrop-upload.js b/lib/clouddrop-upload.js
index afa83ee..6a31130 100644
--- a/lib/clouddrop-upload.js
+++ b/lib/clouddrop-upload.js
@@ -236,7 +236,7 @@ class ClouddropUploader {
    */
   async checkAuth(signal) {
     if (!this.apiKey) throw new Error('Clouddrop: API-Key fehlt');
-    const res = await request(`${API_BASE}/files?limit=1`, {
+    const res = await request(`${API_BASE}/files/?limit=1`, {
       method: 'GET',
       dispatcher: clouddropAgent,
       signal,