diff --git a/index.html b/index.html
index 8fcab6c..90ca624 100644
--- a/index.html
+++ b/index.html
@@ -62,6 +62,13 @@ http://www.skype.com/go/skypebuttons
 <p>I used to be also on some channels at OFTC and IRCnet, but because of problems with shell hoster I am not on them currently.</p>
 <h1 id="miscellaneous-things-related-to-this-site.">Miscellaneous things related to this site.</h1>
 <p><a href="mirrors.html">Mirror list</a></p>
+<p>
+    
+<a href="http://jigsaw.w3.org/css-validator/check/referer"> <img style="border:0;width:88px;height:31px"
+            src="http://jigsaw.w3.org/css-validator/images/vcss"
+            alt="Valid CSS!" /> </a>
+</p>
+
 <p><a rel="license" href="http://creativecommons.org/licenses/by-nc-sa/3.0/"><img alt="Creative Commons License" style="border-width:0" src="http://i.creativecommons.org/l/by-nc-sa/3.0/88x31.png" /></a><br /><span xmlns:dct="http://purl.org/dc/terms/" property="dct:title">mkaysi.github.com</span> by <a xmlns:cc="http://creativecommons.org/ns#" href="http://mkaysi.github.com/" property="cc:attributionName" rel="cc:attributionURL">Mika Suomalainen</a> is licensed under a <a rel="license" href="http://creativecommons.org/licenses/by-nc-sa/3.0/">Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License</a>.<br />Based on a work at <a xmlns:dct="http://purl.org/dc/terms/" href="http://mkaysi.github.com/" rel="dct:source">mkaysi.github.com</a>.</p>
 <div id="clustrmaps-widget"></div><script type="text/javascript">var _clustrmaps = {'url' : 'http://mkaysi.github.com/', 'user' : 1040881, 'server' : '4', 'id' : 'clustrmaps-widget', 'version' : 1, 'date' : '2012-09-02', 'lang' : 'en', 'corners' : 'square' };(function (){ var s = document.createElement('script'); s.type = 'text/javascript'; s.async = true; s.src = 'http://www4.clustrmaps.com/counter/map.js'; var x = document.getElementsByTagName('script')[0]; x.parentNode.insertBefore(s, x);})();</script><noscript>
 <a href="http://www4.clustrmaps.com/user/bd3fe1f1"><img src="http://www4.clustrmaps.com/stats/maps-no_clusters/mkaysi.github.com--thumb.jpg" alt="Locations of visitors to this page" /></a>
diff --git a/index.html.md b/index.html.md
index 266301a..5a81677 100644
--- a/index.html.md
+++ b/index.html.md
@@ -120,6 +120,14 @@ I used to be also on some channels at OFTC and IRCnet, but because of problems w
 
 [Mirror list](mirrors.html)
 
+<p>
+    <a href="http://jigsaw.w3.org/css-validator/check/referer">
+        <img style="border:0;width:88px;height:31px"
+            src="http://jigsaw.w3.org/css-validator/images/vcss"
+            alt="Valid CSS!" />
+    </a>
+</p>
+
 <a rel="license" href="http://creativecommons.org/licenses/by-nc-sa/3.0/"><img alt="Creative Commons License" style="border-width:0" src="http://i.creativecommons.org/l/by-nc-sa/3.0/88x31.png" /></a><br /><span xmlns:dct="http://purl.org/dc/terms/" property="dct:title">mkaysi.github.com</span> by <a xmlns:cc="http://creativecommons.org/ns#" href="http://mkaysi.github.com/" property="cc:attributionName" rel="cc:attributionURL">Mika Suomalainen</a> is licensed under a <a rel="license" href="http://creativecommons.org/licenses/by-nc-sa/3.0/">Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License</a>.<br />Based on a work at <a xmlns:dct="http://purl.org/dc/terms/" href="http://mkaysi.github.com/" rel="dct:source">mkaysi.github.com</a>.
 
 <div id="clustrmaps-widget"></div><script type="text/javascript">var _clustrmaps = {'url' : 'http://mkaysi.github.com/', 'user' : 1040881, 'server' : '4', 'id' : 'clustrmaps-widget', 'version' : 1, 'date' : '2012-09-02', 'lang' : 'en', 'corners' : 'square' };(function (){ var s = document.createElement('script'); s.type = 'text/javascript'; s.async = true; s.src = 'http://www4.clustrmaps.com/counter/map.js'; var x = document.getElementsByTagName('script')[0]; x.parentNode.insertBefore(s, x);})();</script><noscript><a href="http://www4.clustrmaps.com/user/bd3fe1f1"><img src="http://www4.clustrmaps.com/stats/maps-no_clusters/mkaysi.github.com--thumb.jpg" alt="Locations of visitors to this page" /></a></noscript>