diff --git a/LICENSE b/COPYING
similarity index 100%
rename from LICENSE
rename to COPYING
diff --git a/hyde.scm b/hyde.scm
index ec315f4..76f1b90 100644
--- a/hyde.scm
+++ b/hyde.scm
@@ -1,3 +1,20 @@
+;; Copyright (C) <year> <author> <email>
+;;
+;; This file is part of <program>.
+;;
+;; <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.
+;;
+;; <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/>.
+
 (import hyde)
 
 (output-dir "dist")
diff --git a/layouts/default.sxml b/layouts/default.sxml
index 8c4acab..8657373 100644
--- a/layouts/default.sxml
+++ b/layouts/default.sxml
@@ -1,3 +1,20 @@
+;; Copyright (C) <year> <author> <email>
+;;
+;; This file is part of <program>.
+;;
+;; <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.
+;;
+;; <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/>.
+
 ()
 `((xhtml-1.0-strict)
   (html
diff --git a/src/index.sxml b/src/index.sxml
index f88adec..e933e7e 100644
--- a/src/index.sxml
+++ b/src/index.sxml
@@ -1,3 +1,20 @@
+;; Copyright (C) <year> <author> <email>
+;;
+;; This file is part of <program>.
+;;
+;; <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.
+;;
+;; <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/>.
+
 ((title . "title"))
 
 '(div "content")