diff --git a/WebSocketClient/src/ImportExportFiles.ts b/WebSocketClient/src/ImportExportFiles.ts
index 08f674a..4333254 100644
--- a/WebSocketClient/src/ImportExportFiles.ts
+++ b/WebSocketClient/src/ImportExportFiles.ts
@@ -48,5 +48,5 @@ export function uploadFile(): Promise<string> {
             };
         })
     }
-    return new Promise((_resolve, reject) => reject("Cannot reach HTML-Input field"));
+    return Promise.reject("Cannot reach HTML-Input field");
 }
\ No newline at end of file
diff --git a/WebSocketClient/src/intro.ts b/WebSocketClient/src/intro.ts
index c329acc..0e9e2ab 100644
--- a/WebSocketClient/src/intro.ts
+++ b/WebSocketClient/src/intro.ts
@@ -39,7 +39,7 @@ export const initIntroJS = () => {
         intro.setOption("highlightClass", "tmpClass");
         intro.start();
 
-        var helperLayer = document.getElementsByClassName("tmpClass");
+        const helperLayer = document.getElementsByClassName("tmpClass");
         setTimeout(() => {
             if(helperLayer[0] instanceof HTMLElement){
                 helperLayer[0].style["box-shadow"] = "rgb(255, 255, 255) 0px 0px 1px 2px, rgba(230, 230, 230, 0.44) 0px 0px 0px 5000px";