diff --git a/CHANGELOG.md b/CHANGELOG.md
index 519cbc06..74d054de 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,7 @@
         <li>Fixed changes in the ChatGPT web interface when importing in plain text [<a href="https://github.com/micz/ThunderAI/issues/87">#87</a>].</li>
         <li>Added an option to the prompts to specify the default language for the response [<a href="https://github.com/micz/ThunderAI/issues/86">#86</a>].</li>
         <li>Not adding to the prompt the statement about using the default language if asking for a translation [<a href="https://github.com/micz/ThunderAI/issues/85">#85</a>].</li>
+        <li><i>[Thunderbird 128+ only]</i> Added a warning message when closing the Custom Prompts page with unsaved changes [<a href="https://github.com/micz/ThunderAI/issues/88">#88</a>].</li>
         <li>...</li>
       </ul>
 <h2>Version 1.2.0 - 17/07/2024</h2>
diff --git a/options/mzta-release-notes.html b/options/mzta-release-notes.html
index 989633ca..758a7c08 100644
--- a/options/mzta-release-notes.html
+++ b/options/mzta-release-notes.html
@@ -12,6 +12,7 @@
         <li>Fixed changes in the ChatGPT web interface when importing in plain text [<a href="https://github.com/micz/ThunderAI/issues/87">#87</a>].</li>
         <li>Added an option to the prompts to specify the default language for the response [<a href="https://github.com/micz/ThunderAI/issues/86">#86</a>].</li>
         <li>Not adding to the prompt the statement about using the default language if asking for a translation [<a href="https://github.com/micz/ThunderAI/issues/85">#85</a>].</li>
+        <li><i>[Thunderbird 128+ only]</i> Added a warning message when closing the Custom Prompts page with unsaved changes [<a href="https://github.com/micz/ThunderAI/issues/88">#88</a>].</li>
         <li>...</li>
       </ul>
       <h2>Version 1.2.0 - 17/07/2024</h2>