diff --git a/Sources/WireGuardApp/UI/macOS/View/highlighter.c b/Sources/WireGuardApp/UI/macOS/View/highlighter.c
index d89feda..625b7e0 100644
--- a/Sources/WireGuardApp/UI/macOS/View/highlighter.c
+++ b/Sources/WireGuardApp/UI/macOS/View/highlighter.c
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: GPL-2.0
+// SPDX-License-Identifier: MIT
 /*
  * Copyright (C) 2015-2020 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
  */
diff --git a/Sources/WireGuardApp/UI/macOS/View/highlighter.h b/Sources/WireGuardApp/UI/macOS/View/highlighter.h
index 885db2d..8b86acb 100644
--- a/Sources/WireGuardApp/UI/macOS/View/highlighter.h
+++ b/Sources/WireGuardApp/UI/macOS/View/highlighter.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-2.0 */
+/* SPDX-License-Identifier: MIT */
 /*
  * Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
  */
diff --git a/Sources/WireGuardKitC/key.c b/Sources/WireGuardKitC/key.c
index 140f278..84e7f16 100644
--- a/Sources/WireGuardKitC/key.c
+++ b/Sources/WireGuardKitC/key.c
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: GPL-2.0
+// SPDX-License-Identifier: MIT
 /*
  * Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
  *
diff --git a/Sources/WireGuardKitC/key.h b/Sources/WireGuardKitC/key.h
index 149e4ed..5353ade 100644
--- a/Sources/WireGuardKitC/key.h
+++ b/Sources/WireGuardKitC/key.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-2.0 */
+/* SPDX-License-Identifier: MIT */
 /*
  * Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
  */
diff --git a/Sources/WireGuardKitC/x25519.c b/Sources/WireGuardKitC/x25519.c
index b77da0b..7793299 100644
--- a/Sources/WireGuardKitC/x25519.c
+++ b/Sources/WireGuardKitC/x25519.c
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-2.0+
+/* SPDX-License-Identifier: MIT
  *
  * Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
  *
diff --git a/Sources/WireGuardKitGo/Makefile b/Sources/WireGuardKitGo/Makefile
index 03d243b..16cb2d5 100644
--- a/Sources/WireGuardKitGo/Makefile
+++ b/Sources/WireGuardKitGo/Makefile
@@ -1,4 +1,4 @@
-# SPDX-License-Identifier: GPL-2.0
+# SPDX-License-Identifier: MIT
 #
 # Copyright (C) 2018-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
 
diff --git a/Sources/WireGuardKitGo/wireguard.h b/Sources/WireGuardKitGo/wireguard.h
index 21ab4f9..72dbd4d 100644
--- a/Sources/WireGuardKitGo/wireguard.h
+++ b/Sources/WireGuardKitGo/wireguard.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-2.0
+/* SPDX-License-Identifier: MIT
  *
  * Copyright (C) 2018-2021 WireGuard LLC. All Rights Reserved.
  */