diff --git a/src/algorithm.c b/src/algorithm.c
index 9a0bf76..0fb9455 100644
--- a/src/algorithm.c
+++ b/src/algorithm.c
@@ -1,3 +1,22 @@
+/*
+ *   Colloscope - A program that generates a colloscope for French 'classes prépas'
+ *  Copyright (C) 2024  Alexandre Aboujaib
+ *
+ *  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/>.
+ */
+
+
 #include <stdio.h>
 #include <stdlib.h>
 #include <time.h>
diff --git a/src/algorithm.h b/src/algorithm.h
index 7089c80..df85394 100644
--- a/src/algorithm.h
+++ b/src/algorithm.h
@@ -1,3 +1,22 @@
+/*
+ *   Colloscope - A program that generates a colloscope for French 'classes prépas'
+ *  Copyright (C) 2024  Alexandre Aboujaib
+ *
+ *  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/>.
+ */
+
+
 #ifndef ALGORITHM_H_INCLUDED
 #define ALGORITHM_H_INCLUDED
 
diff --git a/src/display.c b/src/display.c
index 9eaa417..d5759b6 100644
--- a/src/display.c
+++ b/src/display.c
@@ -1,3 +1,22 @@
+/*
+ *   Colloscope - A program that generates a colloscope for French 'classes prépas'
+ *  Copyright (C) 2024  Alexandre Aboujaib
+ *
+ *  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/>.
+ */
+
+
 #include <stdio.h>
 
 #include "structure.h"
diff --git a/src/display.h b/src/display.h
index 3347023..3bc2860 100644
--- a/src/display.h
+++ b/src/display.h
@@ -1,3 +1,22 @@
+/*
+ *   Colloscope - A program that generates a colloscope for French 'classes prépas'
+ *  Copyright (C) 2024  Alexandre Aboujaib
+ *
+ *  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/>.
+ */
+
+
 #ifndef DISPLAY_H_INCLUDED
 #define DISPLAY_H_INCLUDED
 
diff --git a/src/main.c b/src/main.c
index 980d469..3dd4465 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1,3 +1,22 @@
+/*
+ *   Colloscope - A program that generates a colloscope for French 'classes prépas'
+ *  Copyright (C) 2024  Alexandre Aboujaib
+ *
+ *  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/>.
+ */
+
+
 #include <stdio.h>
 #include <stdlib.h>
 #include <stdbool.h>
diff --git a/src/structure.c b/src/structure.c
index ae8a499..084a7d2 100644
--- a/src/structure.c
+++ b/src/structure.c
@@ -1,3 +1,22 @@
+/*
+ *   Colloscope - A program that generates a colloscope for French 'classes prépas'
+ *  Copyright (C) 2024  Alexandre Aboujaib
+ *
+ *  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/>.
+ */
+
+
 #include <stdio.h>
 #include <stdlib.h>
 #include <assert.h>
diff --git a/src/structure.h b/src/structure.h
index 09e7a9f..e565386 100644
--- a/src/structure.h
+++ b/src/structure.h
@@ -1,3 +1,22 @@
+/*
+ *   Colloscope - A program that generates a colloscope for French 'classes prépas'
+ *  Copyright (C) 2024  Alexandre Aboujaib
+ *
+ *  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/>.
+ */
+
+
 #ifndef STRUCTURE_H_INCLUDED
 #define STRUCTURE_H_INCLUDED