diff --git a/mimic3_http/templates/index.html b/mimic3_http/templates/index.html
index 5bc40a9..c7ab08f 100644
--- a/mimic3_http/templates/index.html
+++ b/mimic3_http/templates/index.html
@@ -88,7 +88,7 @@
 
                     {% if show_openapi %}
                     <br/><br />
-                    <a href="openapi/" title="OpenAPI page" target="_blank" class="badge badge-info">API</a>
+                    <a href="/openapi/" title="OpenAPI page" target="_blank" class="badge badge-info">API</a>
                     {% endif %}
 
                     <a href="https://mycroft-ai.gitbook.io/docs/mycroft-technologies/mimic-tts/coming-soon-mimic-3" title="Mimic 3 documentation" target="_blank" class="badge">Docs</a>