diff --git a/content/updateArticle.php b/content/updateArticle.php
index 4595eb3..3266217 100644
--- a/content/updateArticle.php
+++ b/content/updateArticle.php
@@ -8,7 +8,7 @@ include_once 'php/controller/showArticle-controller.php';
 <form method="post" action="php/controller/updateArticle-controller.php" id="editor-form" class="article-editor-scope.editor-container article-editor-scope editor-container">
 
     <main class="editor-main">
-        <?php if (isset($_SESSION["message"]) && $_SESSION["message"] == "internal_error"): ?>
+        <?php if (isset($_SESSION["message"]) && $_SESSION["message"] == "internal_error" || $_SESSION["message"] == "missing_id"): ?>
             <p class="alert-message is-error">
                 Es ist ein Fehler beim Speichern aufgetreten. Bitte versuche es erneut.
             </p>
diff --git a/php/controller/showArticle-controller.php b/php/controller/showArticle-controller.php
index ea27a0c..c7c6357 100644
--- a/php/controller/showArticle-controller.php
+++ b/php/controller/showArticle-controller.php
@@ -5,6 +5,7 @@ require_once 'php/model/ArticleManager.php';
 
 if (isset($_GET["id"])){
     try {
+        $id = (int)$_GET["id"];
         $articleManager = ArticleManager::getInstance();
         $article = $articleManager->getArticle($_GET["id"]);
         if($article != null){
diff --git a/php/controller/updateArticle-controller.php b/php/controller/updateArticle-controller.php
index b506d27..6df27d1 100644
--- a/php/controller/updateArticle-controller.php
+++ b/php/controller/updateArticle-controller.php
@@ -9,7 +9,9 @@ if ($_SERVER["REQUEST_METHOD"] === "POST") {
         $_SESSION["message"] = "missing_parameters";
         header("location: ../../index.php?pfad=updateArticle");
         exit();
-    } else {
+    } elseif(!isset($id)) {
+        $_SESSION["message"] = "missing_id";
+    }else{
 
         $newTitle = $_POST["title"];
         $newContent = $_POST["content"];