diff --git a/index.js b/index.js
index <HASH>..<HASH> 100644
--- a/index.js
+++ b/index.js
@@ -1,3 +1,22 @@
+// nabs - Not another build system. Easy management of package.json scripts.
+//
+// Copyright (C) 2019 James Kruth
+//
+// This file is part of nabs.
+//
+// nabs 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.
+//
+// nabs 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 nabs.  If not, see <http://www.gnu.org/licenses/>.
+
 const fs = require('fs');
 const jsonfile = require('jsonfile');
 const { resolve } = require('path');
Source files need headers :)