diff --git a/nexgb/xgbgen/COPYING b/nexgb/xgbgen/COPYING
deleted file mode 100644
index 5c93f45..0000000
--- a/nexgb/xgbgen/COPYING
+++ /dev/null
@@ -1,13 +0,0 @@
-            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
-                    Version 2, December 2004
-
- Copyright (C) 2004 Sam Hocevar <sam@hocevar.net>
-
- Everyone is permitted to copy and distribute verbatim or modified
- copies of this license document, and changing it is allowed as long
- as the name is changed.
-
-            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
-   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
-
-  0. You just DO WHAT THE FUCK YOU WANT TO.
diff --git a/nexgb/xgbgen/LICENSE b/nexgb/xgbgen/LICENSE
new file mode 100644
index 0000000..d34755d
--- /dev/null
+++ b/nexgb/xgbgen/LICENSE
@@ -0,0 +1,13 @@
+Copyright (c) 2012 - 2016, Andrew Gallant <jamslam@gmail.com>
+Copyright (c) 2018, Přemysl Janouch <p@janouch.name>
+
+Permission to use, copy, modify, and/or distribute this software for any
+purpose with or without fee is hereby granted.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.