diff --git a/LICENSE.txt b/LICENSE.txt
index 26039bc..7e5f362 100644
--- a/LICENSE.txt
+++ b/LICENSE.txt
@@ -1,4 +1,6 @@
-                    GNU GENERAL PUBLIC LICENSE
+This work is based on Blades in the Dark (found at http://www.bladesinthedark.com/), product of One Seven Design, developed and authored by John Harper, and licensed for our use under the Creative Commons Attribution 3.0 Unported license (http://creativecommons.org/licenses/by/3.0/).
+
+                      GNU GENERAL PUBLIC LICENSE
                        Version 3, 29 June 2007
 
  Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>