diff --git a/Textbook/index.html b/Textbook/index.html
index 2311b3c..dd0b669 100644
--- a/Textbook/index.html
+++ b/Textbook/index.html
@@ -95,7 +95,7 @@ <h1>Textbook on Legal Network Analysis</h1>
       <h3>Table of Contents</h3>
       <ul class="toc">
         <li><a href="#pdf-link">PDF access</a></li>
-        <li><a href="#google-colab">Open in Google Colab</a></li>
+        <li><a href="#google-colab">Open in Google Colab (UNDER CONSTRUCTION)</a></li>
         <li><a href="#github-link">GitHub Repository</a></li>
       </ul>
     </div>