diff --git a/sources/Grid.py b/sources/Grid.py
index a718294..7ca9a71 100644
--- a/sources/Grid.py
+++ b/sources/Grid.py
@@ -1,3 +1,19 @@
+# 0h h1 Solver. Solves grids of 0h h1 game.
+# Copyright (C) 2015  Gabriel Augendre <gabriel@augendre.info>
+#
+# 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 <http://www.gnu.org/licenses/>.
+
 __author__ = 'gaugendre'
 
 
diff --git a/sources/Square.py b/sources/Square.py
index 34de0df..a7ea243 100644
--- a/sources/Square.py
+++ b/sources/Square.py
@@ -1,3 +1,19 @@
+# 0h h1 Solver. Solves grids of 0h h1 game.
+# Copyright (C) 2015  Gabriel Augendre <gabriel@augendre.info>
+#
+# 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 <http://www.gnu.org/licenses/>.
+
 __author__ = 'gaugendre'