diff --git a/src/file/file-store.js b/src/file/file-store.js
index 4336ebc..6843d7a 100644
--- a/src/file/file-store.js
+++ b/src/file/file-store.js
@@ -40,6 +40,14 @@ class FileStore extends ArrayStore {
       case 'files/upload-error':
         console.log(action.error);
         return state;
+      case 'files/loaded':
+        if (Array.isArray(action.data)) {
+          return super.reduce(state, action)
+        } else {
+          // in this case a file is contained in the response (no JSON)
+          // TODO we have to extract and process the file here (=save it somewhere?)
+          return super.reduce(state, action)
+        }
 
       default:
         return super.reduce(state, action);