diff --git a/src/DigitalData.UserManager.API/ClientApp/user_manager_ui/src/app/components/forms/group-update-form/group-update-form.component.html b/src/DigitalData.UserManager.API/ClientApp/user_manager_ui/src/app/components/forms/group-update-form/group-update-form.component.html
index 3b3e742..f31b7ae 100644
--- a/src/DigitalData.UserManager.API/ClientApp/user_manager_ui/src/app/components/forms/group-update-form/group-update-form.component.html
+++ b/src/DigitalData.UserManager.API/ClientApp/user_manager_ui/src/app/components/forms/group-update-form/group-update-form.component.html
@@ -52,7 +52,7 @@
     <mat-divider></mat-divider>
     <!-- save-button, delete-button -->
     <div class="dd-row button-row">
-        <button mat-fab extended (click)="update()">
+        <button mat-fab extended (click)="update()" [disabled]='group.internal'>
             <mat-icon>save</mat-icon>
             Speichern
         </button>