diff --git a/internal/lib/continuedFrac.go b/internal/lib/continuedFrac.go
index 1f96e8d..5b819cd 100644
--- a/internal/lib/continuedFrac.go
+++ b/internal/lib/continuedFrac.go
@@ -1,3 +1,19 @@
+/*
+Copyright © 2025 filifa
+
+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/>.
+*/
 package lib
 
 import (
diff --git a/internal/lib/crt.go b/internal/lib/crt.go
index 2728749..8314702 100644
--- a/internal/lib/crt.go
+++ b/internal/lib/crt.go
@@ -1,3 +1,19 @@
+/*
+Copyright © 2025 filifa
+
+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/>.
+*/
 package lib
 
 import (
diff --git a/internal/lib/primitiveRoot.go b/internal/lib/primitiveRoot.go
index 68669ec..099687c 100644
--- a/internal/lib/primitiveRoot.go
+++ b/internal/lib/primitiveRoot.go
@@ -1,3 +1,19 @@
+/*
+Copyright © 2025 filifa
+
+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/>.
+*/
 package lib
 
 import (