diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7f370cd5..3deb0b4c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,7 @@
 <h2>Version 3.8.0 - ??/??/2025</h2>
       <ul>
         <li><i>[OpenAI API]</i> Model filtering improved when choosing a model in the options page.</li>
+        <li><i>[OpenAI API]</i> Now using the new Responses API [<a href="https://github.com/micz/ThunderAI/issues/407">#407</a>].</li>
         <li>...</li>
       </ul>
 <h2>Version 3.7.8 - 18/12/2025</h2>
diff --git a/options/mzta-release-notes.html b/options/mzta-release-notes.html
index d66af704..7f5c8c31 100644
--- a/options/mzta-release-notes.html
+++ b/options/mzta-release-notes.html
@@ -10,6 +10,7 @@
       <h2>Version 3.8.0 - ??/??/2025</h2>
       <ul>
         <li><i>[OpenAI API]</i> Model filtering improved when choosing a model in the options page.</li>
+        <li><i>[OpenAI API]</i> Now using the new Responses API [<a href="https://github.com/micz/ThunderAI/issues/407">#407</a>].</li>
         <li>...</li>
       </ul>
       <h2>Version 3.7.8 - 18/12/2025</h2>