diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..2a4599b
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,13 @@
+Copyright (C) 2018-2024  Joachim Wiberg <troglobit@gmail.com>
+
+Permission to use, copy, modify, and/or distribute this software for any
+purpose with or without fee is hereby granted, provided that the above
+copyright notice and this permission notice appear in all copies.
+
+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.
diff --git a/README.md b/README.md
index 887b8bc..52bc973 100644
--- a/README.md
+++ b/README.md
@@ -77,7 +77,7 @@ win an election.
 
 [GitHub]:          https://github.com/kernelkit/mcd/actions/workflows/build.yml/
 [GitHub Status]:   https://github.com/kernelkit/mcd/actions/workflows/build.yml/badge.svg
-[License]:         http://www.openbsd.org/cgi-bin/cvsweb/src/usr.sbin/mrouted/LICENSE
-[License Badge]:   https://img.shields.io/badge/License-BSD%203--Clause-blue.svg
+[License]:         https://en.wikipedia.org/wiki/ISC_license
+[License Badge]:   https://img.shields.io/badge/License-ISC-blue.svg
 [Coverity Scan]:   https://scan.coverity.com/projects/24475
 [Coverity Status]: https://scan.coverity.com/projects/24475/badge.svg