diff --git a/CustomSessionStore.inc b/CustomSessionStore.inc
index 4288449..da74b8e 100644
--- a/CustomSessionStore.inc
+++ b/CustomSessionStore.inc
@@ -1,4 +1,8 @@
 <?php
+/*
+Copyright (c) 2009 Yahoo! Inc. All rights reserved.
+The copyrights embodied in the content of this file are licensed under the BSD (revised) open source license
+*/
 class CustomSessionStore{
 	function CustomSessionStore(){}
 	/**
diff --git a/demo.html b/demo.html
index d9e9c1e..5c13621 100644
--- a/demo.html
+++ b/demo.html
@@ -1,3 +1,7 @@
+<!--
+Copyright (c) 2009 Yahoo! Inc. All rights reserved.
+The copyrights embodied in the content of this file are licensed under the BSD (revised) open source license
+-->
 <div id="widget" style="display:none">widget</div>
 <script type="text/javascript" src="http://yui.yahooapis.com/combo?2.7.0/build/yuiloader/yuiloader-min.js"></script>
 <script src="widget.js"></script>
\ No newline at end of file
diff --git a/index.php b/index.php
index b9410ce..1b9f6b0 100644
--- a/index.php
+++ b/index.php
@@ -1,4 +1,8 @@
 <?php 
+/*
+Copyright (c) 2009 Yahoo! Inc. All rights reserved.
+The copyrights embodied in the content of this file are licensed under the BSD (revised) open source license
+*/
 require_once("config.php");
 require_once("php_sdk/Yahoo.inc");
 require_once("CustomSessionStore.inc");
diff --git a/license.txt b/license.txt
new file mode 100644
index 0000000..87a7ef6
--- /dev/null
+++ b/license.txt
@@ -0,0 +1,32 @@
+Software License Agreement (BSD License)
+Copyright (c) 2009, Yahoo! Inc.
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms, with 
+or without modification, are permitted provided that the following 
+conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of Yahoo! Inc. nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of Yahoo! Inc.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE 
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
\ No newline at end of file
diff --git a/widget.js b/widget.js
index 7898fb2..c45b87e 100644
--- a/widget.js
+++ b/widget.js
@@ -1,3 +1,7 @@
+/*
+Copyright (c) 2009 Yahoo! Inc. All rights reserved.
+The copyrights embodied in the content of this file are licensed under the BSD (revised) open source license
+*/
 var widget = document.getElementById('widget'),
 	token = null,
 	url = 'index.php',