diff --git a/IPython/nbconvert/utils/lexers.py b/IPython/nbconvert/utils/lexers.py
index da961cf..cc2a7a1 100644
--- a/IPython/nbconvert/utils/lexers.py
+++ b/IPython/nbconvert/utils/lexers.py
@@ -24,6 +24,13 @@ This includes:
         to Pygments.
 
 """
+#-----------------------------------------------------------------------------
+# Copyright (c) 2013, the IPython Development Team.
+#
+# Distributed under the terms of the Modified BSD License.
+#
+# The full license is in the file COPYING.txt, distributed with this software.
+#-----------------------------------------------------------------------------
 
 # Standard library
 import re