diff --git a/gudap.el b/gudap.el
index b448347..0ae2b80 100644
--- a/gudap.el
+++ b/gudap.el
@@ -6,6 +6,19 @@
 ;; Package-Requires:
 ;; Keywords: languages, debug, dap
 
+;; 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/>.
+
 ;;; Commentary:
 
 ;; gudap.el is a Debug Adapter Protocol client for Emacs.