diff --git a/ChangeLog b/ChangeLog
index 1ecc594584..6fc58dd460 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Mon Nov 10 14:17:58 2014  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
+
+	* lib/rdoc/*.rb: Update to RDoc 4.2.0.alpha(579a11c)
+
 Mon Nov 10 12:44:39 2014  Tanaka Akira  <akr@fsij.org>
 
 	* lib/webrick/server.rb: Less instance variables.
diff --git a/lib/rdoc/generator/template/darkfish/_footer.rhtml b/lib/rdoc/generator/template/darkfish/_footer.rhtml
index 3d9526f02a..fe5822cc6b 100644
--- a/lib/rdoc/generator/template/darkfish/_footer.rhtml
+++ b/lib/rdoc/generator/template/darkfish/_footer.rhtml
@@ -1,5 +1,5 @@
 <footer id="validator-badges" role="contentinfo">
   <p><a href="http://validator.w3.org/check/referer">Validate</a>
-  <p>Generated by <a href="http://rdoc.rubyforge.org">RDoc</a> <%= RDoc::VERSION %>.
-  <p>Based on <a href="http://deveiate.org/projects/Darkfish-Rdoc/">Darkfish</a> by <a href="http://deveiate.org">Michael Granger</a>.
+  <p>Generated by <a href="http://docs.seattlerb.org/rdoc/">RDoc</a> <%= RDoc::VERSION %>.
+  <p>Based on <a href="http://deveiate.org/projects/Darkfish-RDoc/">Darkfish</a> by <a href="http://deveiate.org">Michael Granger</a>.
 </footer>
diff --git a/lib/rdoc/known_classes.rb b/lib/rdoc/known_classes.rb
index a04068a435..ddc932c7c0 100644
--- a/lib/rdoc/known_classes.rb
+++ b/lib/rdoc/known_classes.rb
@@ -59,6 +59,7 @@ module RDoc
     "rb_eZeroDivError"     => "ZeroDivError",
 
     "rb_mComparable"       => "Comparable",
+    "rb_mDL"               => "DL",
     "rb_mEnumerable"       => "Enumerable",
     "rb_mErrno"            => "Errno",
     "rb_mFConst"           => "File::Constants",