diff --git a/bin/github-markup b/bin/github-markup
index 76e5e369..0d442bb2 100755
--- a/bin/github-markup
+++ b/bin/github-markup
@@ -3,8 +3,26 @@
 $LOAD_PATH.unshift File.dirname(__FILE__) + "/../lib"
 require 'github/markup'
 
-if ARGV[0] && File.exists?(file = ARGV[0])
-  puts GitHub::Markup.render(file)
-else
-  puts "usage: #$0 FILE"
+if ARGV.size < 1
+  print "usage: #$0 FILE [ FILES ... ]\n"
+  exit 1
 end
+
+sources = []
+
+ARGV.each { |s|
+  begin
+    file = File.open( s, "r" )
+    sources.push [ s, file ]
+  rescue Exception => e
+    $stderr.print "error: #{e.message}\n"
+    exit 1
+  ensure
+  end
+}
+
+sources.each { |name, file|
+  print GitHub::Markup.render( name, file.read )
+  file.close
+}
+