diff --git a/COPYING b/COPYING
index f288702..0a04128 100644
--- a/COPYING
+++ b/COPYING
@@ -1,674 +1,165 @@
-                    GNU GENERAL PUBLIC LICENSE
+                   GNU LESSER GENERAL PUBLIC LICENSE
                        Version 3, 29 June 2007
 
  Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
  Everyone is permitted to copy and distribute verbatim copies
  of this license document, but changing it is not allowed.
 
-                            Preamble
 
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+  This version of the GNU Lesser General Public License incorporates
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-  In the following three paragraphs, a "patent license" is any express
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-(such as an express permission to practice a patent or covenant not to
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-then you must either (1) cause the Corresponding Source to be so
-available, or (2) arrange to deprive yourself of the benefit of the
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-license to downstream recipients.  "Knowingly relying" means you have
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-  A patent license is "discriminatory" if it does not include within
-the scope of its coverage, prohibits the exercise of, or is
-conditioned on the non-exercise of one or more of the rights that are
-specifically granted under this License.  You may not convey a covered
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-or that patent license was granted, prior to 28 March 2007.
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-  Nothing in this License shall be construed as excluding or limiting
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-  12. No Surrender of Others' Freedom.
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-  If conditions are imposed on you (whether by court order, agreement or
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-the Program, the only way you could satisfy both those terms and this
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-  13. Use with the GNU Affero General Public License.
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-  Notwithstanding any other provision of this License, you have
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-under version 3 of the GNU Affero General Public License into a single
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-but the special requirements of the GNU Affero General Public License,
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-  14. Revised Versions of this License.
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-  The Free Software Foundation may publish revised and/or new versions of
-the GNU General Public License from time to time.  Such new versions will
-be similar in spirit to the present version, but may differ in detail to
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-  Each version is given a distinguishing version number.  If the
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-GNU General Public License, you may choose any version ever published
-by the Free Software Foundation.
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-  If the Program specifies that a proxy can decide which future
-versions of the GNU General Public License can be used, that proxy's
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-author or copyright holder as a result of your choosing to follow a
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-  17. Interpretation of Sections 15 and 16.
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-reviewing courts shall apply local law that most closely approximates
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-                     END OF TERMS AND CONDITIONS
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-            How to Apply These Terms to Your New Programs
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-  If you develop a new program, and you want it to be of the greatest
-possible use to the public, the best way to achieve this is to make it
-free software which everyone can redistribute and change under these terms.
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-  To do so, attach the following notices to the program.  It is safest
-to attach them to the start of each source file to most effectively
-state the exclusion of warranty; and each file should have at least
-the "copyright" line and a pointer to where the full notice is found.
-
-    <one line to give the program's name and a brief idea of what it does.>
-    Copyright (C) <year>  <name of author>
-
-    This program is free software: you can redistribute it and/or modify
-    it under the terms of the GNU General Public License as published by
-    the Free Software Foundation, either version 3 of the License, or
-    (at your option) any later version.
-
-    This program is distributed in the hope that it will be useful,
-    but WITHOUT ANY WARRANTY; without even the implied warranty of
-    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-    GNU General Public License for more details.
-
-    You should have received a copy of the GNU General Public License
-    along with this program.  If not, see <https://www.gnu.org/licenses/>.
-
-Also add information on how to contact you by electronic and paper mail.
-
-  If the program does terminal interaction, make it output a short
-notice like this when it starts in an interactive mode:
-
-    <program>  Copyright (C) <year>  <name of author>
-    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
-    This is free software, and you are welcome to redistribute it
-    under certain conditions; type `show c' for details.
-
-The hypothetical commands `show w' and `show c' should show the appropriate
-parts of the General Public License.  Of course, your program's commands
-might be different; for a GUI interface, you would use an "about box".
-
-  You should also get your employer (if you work as a programmer) or school,
-if any, to sign a "copyright disclaimer" for the program, if necessary.
-For more information on this, and how to apply and follow the GNU GPL, see
-<https://www.gnu.org/licenses/>.
-
-  The GNU General Public License does not permit incorporating your program
-into proprietary programs.  If your program is a subroutine library, you
-may consider it more useful to permit linking proprietary applications with
-the library.  If this is what you want to do, use the GNU Lesser General
-Public License instead of this License.  But first, please read
-<https://www.gnu.org/licenses/why-not-lgpl.html>.
+  If the Library as you received it specifies that a proxy can decide
+whether future versions of the GNU Lesser General Public License shall
+apply, that proxy's public statement of acceptance of any version is
+permanent authorization for you to choose that version for the
+Library.