diff --git a/src/lib/base/String.cpp b/src/lib/base/String.cpp
index cba26ca46..f71fb952e 100644
--- a/src/lib/base/String.cpp
+++ b/src/lib/base/String.cpp
@@ -1,18 +1,9 @@
 /*
  * Deskflow -- mouse and keyboard sharing utility
- * Copyright (C) 2014-2016 Symless Ltd.
- *
- * This package is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * found in the file LICENSE that should have accompanied this file.
- *
- * This package 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/>.
+ * SPDX-FileCopyrightText: (C) 2025 Deskflow Developers
+ * SPDX-FileCopyrightText: (C) 2012 - 2016 Symless Ltd.
+ * SPDX-FileCopyrightText: (C) 2002 Chris Schoeneman
+ * SPDX-License-Identifier: GPL-2.0-only WITH LicenseRef-OpenSSL-Exception
  */
 
 #include "base/String.h"
diff --git a/src/lib/base/String.h b/src/lib/base/String.h
index 7f79c59c3..993ece3b4 100644
--- a/src/lib/base/String.h
+++ b/src/lib/base/String.h
@@ -1,19 +1,9 @@
 /*
  * Deskflow -- mouse and keyboard sharing utility
- * Copyright (C) 2012-2016 Symless Ltd.
- * Copyright (C) 2002 Chris Schoeneman
- *
- * This package is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * found in the file LICENSE that should have accompanied this file.
- *
- * This package 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/>.
+ * SPDX-FileCopyrightText: (C) 2025 Deskflow Developers
+ * SPDX-FileCopyrightText: (C) 2012 - 2016 Symless Ltd.
+ * SPDX-FileCopyrightText: (C) 2002 Chris Schoeneman
+ * SPDX-License-Identifier: GPL-2.0-only WITH LicenseRef-OpenSSL-Exception
  */
 
 #pragma once