diff --git a/ChunkManager.cpp b/ChunkManager.cpp
index 1579fb3..cfec97b 100644
--- a/ChunkManager.cpp
+++ b/ChunkManager.cpp
@@ -1,3 +1,22 @@
+/*
+ * This file is part of VoidArchiveTool.
+ *
+ * Copyright (C) 2025 Yanczi
+ *
+ * Void Archive Toolis free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 #include "ChunkManager.h"
 
 ChunkManager::ChunkManager(EncryptionManager& em)
diff --git a/ChunkManager.h b/ChunkManager.h
index f7f662e..dd453c7 100644
--- a/ChunkManager.h
+++ b/ChunkManager.h
@@ -1,3 +1,22 @@
+/*
+ * This file is part of VoidArchiveTool.
+ *
+ * Copyright (C) 2025 Yanczi
+ *
+ * Void Archive Toolis free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 #pragma once
 
 #include <vector>
diff --git a/CompressionManager.cpp b/CompressionManager.cpp
index 56825a4..27a2435 100644
--- a/CompressionManager.cpp
+++ b/CompressionManager.cpp
@@ -1,3 +1,22 @@
+/*
+ * This file is part of VoidArchiveTool.
+ *
+ * Copyright (C) 2025 Yanczi
+ *
+ * Void Archive Toolis free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 #include "CompressionManager.h"
 
 CompressionManager::CompressionManager()
diff --git a/CompressionManager.h b/CompressionManager.h
index e49956a..83eef36 100644
--- a/CompressionManager.h
+++ b/CompressionManager.h
@@ -1,3 +1,22 @@
+/*
+ * This file is part of VoidArchiveTool.
+ *
+ * Copyright (C) 2025 Yanczi
+ *
+ * Void Archive Toolis free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 #pragma once
 
 #include <iostream>
diff --git a/EncryptionManager.cpp b/EncryptionManager.cpp
index aa49bd8..32f533d 100644
--- a/EncryptionManager.cpp
+++ b/EncryptionManager.cpp
@@ -1,3 +1,22 @@
+/*
+ * This file is part of VoidArchiveTool.
+ *
+ * Copyright (C) 2025 Yanczi
+ *
+ * Void Archive Toolis free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 #include "EncryptionManager.h"
 
 EncryptionManager::EncryptionManager()
diff --git a/EncryptionManager.h b/EncryptionManager.h
index 61a03e4..c795bd7 100644
--- a/EncryptionManager.h
+++ b/EncryptionManager.h
@@ -1,3 +1,22 @@
+/*
+ * This file is part of VoidArchiveTool.
+ *
+ * Copyright (C) 2025 Yanczi
+ *
+ * Void Archive Toolis free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 #pragma once
 
 #include <sodium.h>
diff --git a/Interface.cpp b/Interface.cpp
index 9e0d7e6..aff711b 100644
--- a/Interface.cpp
+++ b/Interface.cpp
@@ -1,3 +1,22 @@
+/*
+ * This file is part of VoidArchiveTool.
+ *
+ * Copyright (C) 2025 Yanczi
+ *
+ * Void Archive Toolis free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 #include "Interface.h"
 
 Interface::Interface() {
diff --git a/Interface.h b/Interface.h
index e060f7f..5523efd 100644
--- a/Interface.h
+++ b/Interface.h
@@ -1,3 +1,22 @@
+/*
+ * This file is part of VoidArchiveTool.
+ *
+ * Copyright (C) 2025 Yanczi
+ *
+ * Void Archive Toolis free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 #pragma once
 
 #include <ftxui/dom/elements.hpp>