diff --git a/public/tools/tls-test/index.html b/public/tools/tls-test/index.html
index 05cea5f..7461cfb 100644
--- a/public/tools/tls-test/index.html
+++ b/public/tools/tls-test/index.html
@@ -22,7 +22,7 @@
                 {% endif %}
                 <p class="tls-landing-links">
                     <a href="#usage-notes" class="text-tx-alt text-underline">使用上の注意</a>
-                    <a href="#api-docs" class="text-tx-alt text-underline">APIドキュメント</a>
+                    <a href="#api-docs" class="text-tx-alt text-underline">API</a>
                 </p>
             </section>
 
@@ -41,7 +41,7 @@
 
             <section id="api-docs" class="tls-aux-section">
                 <div class="block">
-                    <h2 class="font-large">APIドキュメント</h2>
+                    <h2 class="font-large">API</h2>
                     <p class="font-small text-tx-alt">同等の機能を JSON API として提供しています。</p>
                     <pre><code>POST /api/tools/tls-test/scan
 Content-Type: application/json