diff --git a/index.html b/index.html
index b556fe7..a1bee77 100755
--- a/index.html
+++ b/index.html
@@ -36,13 +36,12 @@
   <ul>
       <li> <a href=doc/intro.html>Introduction </a></code>
           
-      <li><a href=doc/range.htm>Range concepts:</a>
+      <li><a href=doc/range.html>Range concepts:</a>
       <ul>
-          <li> <a href="doc/range.htm#single_pass_range">SinglePassRange</a> 
-          <li> <a href="doc/range.htm#range">ForwardRange</a>
-          <li> <a href="doc/range.htm#reversible_range">BidirectionalRange</a>    
-          <li> <a href="doc/range.htm#random_access_range">RandomAccessRange</a> 
-      </ul>
+          <li> <a href="doc/range.html#single_pass_range">SinglePassRange</a> 
+          <li> <a href="doc/range.html#range">ForwardRange</a>
+          <li> <a href="doc/range.html#reversible_range">BidirectionalRange</a>    
+          <li> <a href="doc/range.html#random_access_range">RandomAccessRange</a> </ul>
 
       <li> <a href=doc/boost_range.html>Implementation</a> of Range concepts
        <li> <a href=doc/utility_class.html> Utilities:</a>