diff --git a/_includes/warning.html b/_includes/warning.html
new file mode 100644
index 0000000000..3c9382e159
--- /dev/null
+++ b/_includes/warning.html
@@ -0,0 +1 @@
+<p class="warning">This version of the OpenSearch documentation is no longer maintained. For the latest version, see the <a href="{{ site.url }}/docs{{ page.url }}">current documentation</a>. For information about OpenSearch version maintenance, see <a href="https://opensearch.org/releases.html">Release Schedule and Maintenance Policy</a>.</p>
\ No newline at end of file
diff --git a/_layouts/default.html b/_layouts/default.html
index 32ff1130c4..358da75e29 100755
--- a/_layouts/default.html
+++ b/_layouts/default.html
@@ -168,6 +168,7 @@ <h1><a href="/docs/latest/">Documentation</a></h1>
           {% endif %}
         {% endunless %}
         <div id="main-content" class="main-content" role="main">
+          {% include warning.html %}
           {% if site.heading_anchors != false %}
             {% include vendor/anchor_headings.html html=content beforeHeading="true" anchorBody="<svg viewBox=\"0 0 16 16\" aria-hidden=\"true\"><use xlink:href=\"#svg-link\"></use></svg>" anchorClass="anchor-heading" anchorAttrs="aria-labelledby=\"%html_id%\"" %}
           {% else %}