diff --git a/institut/templates/404.html b/institut/templates/404.html
index 2a639b880a82fcca04bb8386b145c41d08b1cea3..b4243ba24e02d34d45045ca8e8ce3597c411a5b4 100644
--- a/institut/templates/404.html
+++ b/institut/templates/404.html
@@ -12,3 +12,4 @@
         </p>
     </div>
 </main>
+{% endblock %}
diff --git a/institut/templates/500.html b/institut/templates/500.html
index f80f0f89ac686ec1054f5216d23df3da956270c2..00618f4e313ecf26abf7a101f54763d5ff921289 100644
--- a/institut/templates/500.html
+++ b/institut/templates/500.html
@@ -11,3 +11,4 @@
         </p>
     </div>
 </main>
+{% endblock %}