diff --git a/xmlstyle.html b/xmlstyle.html
index ba4a376..4a87321 100644
--- a/xmlstyle.html
+++ b/xmlstyle.html
@@ -669,7 +669,7 @@ Which will serve me best?"
     Wise hackers smile like tigers.
 </p>
 <p>
-&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; --a <a href="http://en.wikipedia.org/wiki/Waka_%28poetry%29#Tanka" id="s3k3" title="tanka">tanka</a>, or extended haiku
+&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; --a <a href="https://en.wikipedia.org/wiki/Waka_%28poetry%29#Forms_of_waka" id="s3k3" title="tanka">tanka</a>, or extended haiku
 
 </p>
 </div>