diff --git a/LICENSE b/LICENSE
index 603f20a..cf1ea79 100644
--- a/LICENSE
+++ b/LICENSE
@@ -8,11 +8,11 @@
 // 
 // Permission to use, copy, modify and distribute this software and its 
 // documentation for educational, research and non-profit purposes only. 
-// Any modification based on this work must be open source and prohibited 
+// Any modification based on this work must be open-source and prohibited 
 // for commercial use. 
 // You must retain, in the source form of any derivative works that you  
 // distribute, all copyright, patent, trademark, and attribution notices  
 // from the source form of this work. 
 //  
-// 
+// For commercial uses of this code, please send email to xwzhou@zju.edu.cn
 ////////////////////////////////////////////////////////////////////////////