diff --git a/techniques/general/G56.html b/techniques/general/G56.html
index f202c4a3ba..fbabef4607 100644
--- a/techniques/general/G56.html
+++ b/techniques/general/G56.html
@@ -69,12 +69,12 @@ <h3>Insufficient Audio Contrast between a narrator and background music</h3>
             <li>#5 is true</li>
          </ul>
       </section>
-   </section><section id="resources"><h2>Resources</h2>
-      
+    </section><section id="resources"><h2>Resources</h2>
+
          <ul>
             <li>
-               <a href="http://www.eramp.com/david/audio_contrast_general_techs.htm">Audio creation / contrast tutorial</a>
+               <a href="https://web.archive.org/web/20170716020055/http://www.eramp.com/david/audio_contrast_general_techs.htm">Audio creation / contrast tutorial</a>
             </li>
          </ul>
-      
+
    </section></body></html>