diff --git a/layouts/api.html b/layouts/api.html
index 888f27d185..bfa48f550b 100644
--- a/layouts/api.html
+++ b/layouts/api.html
@@ -117,6 +117,6 @@
         {{ end }}
       </article>
     </main>
-    <script src="https://cdn.redoc.ly/redoc/latest/bundles/redoc.standalone.js"></script>
+    <script src="https://cdn.redoc.ly/redoc/v2.5.1/bundles/redoc.standalone.js"></script>
   </body>
 </html>