diff --git a/navigation.html b/navigation.html
index b1506d4..8a27507 100644
--- a/navigation.html
+++ b/navigation.html
@@ -58,6 +58,7 @@
     </button>
     <div class="dropdown-content">
       <a href="organigramm.html">Organigramm</a>
+      <a href="investitionsrechnung.html">Investitionsrechnung</a>
     </div>
   </div>
   <div class="dropdown">