diff --git a/COPYING.txt b/COPYING.txt
index d650496..9d37737 100644
--- a/COPYING.txt
+++ b/COPYING.txt
@@ -1,13 +1,40 @@
-     This software has been authored by an employee or employees of Los
-     Alamos National Security, LLC, operator of the Los Alamos National
-     Laboratory (LANL) under Contract No. DE-AC52-06NA25396 with the
-     U.S.  Department of Energy.  The U.S. Government has rights to use,
-     reproduce, and distribute this software.  The public may copy,
-     distribute, prepare derivative works and publicly display this
-     software without charge, provided that this Notice and any
-     statement of authorship are reproduced on all copies.  Neither the
-     Government nor LANS makes any warranty, express or implied, or
-     assumes any liability or responsibility for the use of this
-     software.  If software is modified to produce derivative works,
-     such modified software should be clearly marked, so as not to
-     confuse it with the version available from LANL.
+This is free and unencumbered software released into the public domain.
+
+Anyone is free to copy, modify, publish, use, compile, sell, or
+distribute this software, either in source code form or as a compiled
+binary, for any purpose, commercial or non-commercial, and by any
+means.
+
+In jurisdictions that recognize copyright laws, the author or authors
+of this software dedicate any and all copyright interest in the
+software to the public domain. We make this dedication for the benefit
+of the public at large and to the detriment of our heirs and
+successors. We intend this dedication to be an overt act of
+relinquishment in perpetuity of all present and future rights to this
+software under copyright law.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+OTHER DEALINGS IN THE SOFTWARE.
+
+For more information, please refer to <http://unlicense.org/>
+
+----
+
+This software has been authored by an employee or employees of Los
+Alamos National Security, LLC, operator of the Los Alamos National
+Laboratory (LANL) under Contract No. DE-AC52-06NA25396 with the
+U.S.  Department of Energy.  The U.S. Government has rights to use,
+reproduce, and distribute this software.  The public may copy,
+distribute, prepare derivative works and publicly display this
+software without charge, provided that this Notice and any
+statement of authorship are reproduced on all copies.  Neither the
+Government nor LANS makes any warranty, express or implied, or
+assumes any liability or responsibility for the use of this
+software.  If software is modified to produce derivative works,
+such modified software should be clearly marked, so as not to
+confuse it with the version available from LANL.