diff --git a/frontend/src/scripts/index.js b/frontend/src/scripts/index.js
index 67c6af6..f5da8bc 100644
--- a/frontend/src/scripts/index.js
+++ b/frontend/src/scripts/index.js
@@ -77,20 +77,20 @@ class Main extends Component {
                 data: formData,
                 onUploadProgress: ({loaded, total}) => this.setState({uploadProgress: loaded/total})
             }
-        ).then(resp => resp.json()).then(json => {
+        ).then(({data}) => {
             this.setState({progress:false, uploadProgress: 1.0});
-            if(json.reason){
+            if(data.reason){
                 this.setState({
-                    text: json.reason,
+                    text: data.reason,
                     status: "failed",
                 })
             } else {
                 this.setState({
-                    text: json.success,
+                    text: data.success,
                     status: "success",
                 })
-                if (json.redirect){
-                    window.open(json.redirect ,"_self")
+                if (data.redirect){
+                    window.open(data.redirect ,"_self")
                 }
             }
         });
@@ -162,7 +162,7 @@ class Main extends Component {
     <div>
         <form id="form" action="/api/upload_files" class="container" onSubmit={(e) => this.onSubmit(e)}>
             <label>Zvolte soubory <input type="file" name="files" accept=".jpg,.png,.webp,.webm,.avi,.mkv,.mp4" multiple={true}  onChange={(e)=> this.handleChangeFiles.bind(this)(e)}/></label>
-            <button type="submit" class="btn btn-primary">Nahrát</button>
+            <button type="submit" class="btn btn-primary">Nahrát</button> <b>progress: {this.state.uploadProgress}</b>
         </form>
     </div>}
     {this.state.page == "#payment" &&