diff --git a/django/templates/play/lobby.html b/django/templates/play/lobby.html
index 9c9b364..bee4118 100644
--- a/django/templates/play/lobby.html
+++ b/django/templates/play/lobby.html
@@ -12,7 +12,7 @@
             <div class="bg-blue-100 rounded-lg p-4 mb-4">
                 <h1 class="text-4xl font-bold text-blue-800">{{ quiz_game.join_code }}</h1>
                 <div class="w-full flex justify-center my-2">
-                <img src="data:image/png;base64,{{ qr_code_base64 }}" class="h-50 w-50" alt="QR-Code">
+                <img src="data:image/png;base64,{{ qr_code_base64 }}" class="h-1/2 w-1/2" alt="QR-Code">
                 </div>
                 <p class="text-sm text-blue-600 mt-1">Spiel-Code</p>
             </div>