diff --git a/docs/_themes/kr/layout.html b/docs/_themes/kr/layout.html
index be68ab2..087a852 100755
--- a/docs/_themes/kr/layout.html
+++ b/docs/_themes/kr/layout.html
@@ -23,7 +23,7 @@
 
     </div>
     <a style="position: absolute; top: 0; right: 0; border: 0;" href="https://github.com/pudo/dataset" class="github">
-        <img src="http://s3.amazonaws.com/github/ribbons/forkme_right_darkblue_121621.png" alt="Fork me on GitHub"  class="github"/>
+        <img src="https://s3.amazonaws.com/github/ribbons/forkme_right_darkblue_121621.png" alt="Fork me on GitHub"  class="github"/>
     </a>
 
 {%- endblock %}