diff --git a/index.html b/index.html
index e37af87..6e1ddb4 100644
--- a/index.html
+++ b/index.html
@@ -116,7 +116,7 @@ <h2>
 <h2>
 <a name="license" class="anchor" href="#license"><span class="octicon octicon-link"></span></a>License</h2>
 
-<p><a href="http://creativecommons.org/publicdomain/zero/1.0/"><img src="http://i.creativecommons.org/p/zero/1.0/88x31.png" alt="cc0"></a></p>
+<p><a href="https://creativecommons.org/publicdomain/zero/1.0/"><img src="https://licensebuttons.net/p/zero/1.0/88x31.png" alt="Creative Commons CC0 Public Domain"></a></p>
       </section>
       <footer>
         <p>This project is maintained by <a href="https://github.com/LibraryOfCongress">LibraryOfCongress</a></p>