diff --git a/hedgedoc/config.json b/hedgedoc/config.json
index 7806e25..6239902 100644
--- a/hedgedoc/config.json
+++ b/hedgedoc/config.json
@@ -10,6 +10,7 @@
         "allowEmailRegister": false,
         "defaultPermission": "limited",
         "allowAnonymous": false,
+        "imageUploadType": "s3",
         "hsts": {
             "enable": true,
             "maxAgeSeconds": 31536000,