diff --git a/subproject/simple/simple_dragonbox.h b/subproject/simple/simple_dragonbox.h
index 4d1e634..8719b37 100644
--- a/subproject/simple/simple_dragonbox.h
+++ b/subproject/simple/simple_dragonbox.h
@@ -1,9 +1,24 @@
+// Copyright 2024 Junekey Jeon, Toby Bell
+// 
+// The contents of this file may be used under the terms of
+// the Apache License v2.0 with LLVM Exceptions.
+//
+//    (See accompanying file LICENSE-Apache or copy at
+//     https://llvm.org/foundation/relicensing/LICENSE.txt)
+//
+// Alternatively, the contents of this file may be used under the terms of
+// the Boost Software License, Version 1.0.
+//    (See accompanying file LICENSE-Boost or copy at
+//     https://www.boost.org/LICENSE_1_0.txt)
+//
+// Unless required by applicable law or agreed to in writing, this software
+// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.
+
+
 #ifndef JKJ_HEADER_SIMPLE_DRAGONBOX
 #define JKJ_HEADER_SIMPLE_DRAGONBOX
 
-// Copyright 2024 Junekey Jeon, Toby Bell
-// TODO: License
-
 #include <cassert>
 #include <climits>
 #include <cstdint>
diff --git a/subproject/simple/simple_dragonbox_test.cpp b/subproject/simple/simple_dragonbox_test.cpp
index 4fea5c6..0c84673 100644
--- a/subproject/simple/simple_dragonbox_test.cpp
+++ b/subproject/simple/simple_dragonbox_test.cpp
@@ -1,5 +1,19 @@
 // Copyright 2024 Junekey Jeon, Toby Bell
-// TODO: License
+//
+// The contents of this file may be used under the terms of
+// the Apache License v2.0 with LLVM Exceptions.
+//
+//    (See accompanying file LICENSE-Apache or copy at
+//     https://llvm.org/foundation/relicensing/LICENSE.txt)
+//
+// Alternatively, the contents of this file may be used under the terms of
+// the Boost Software License, Version 1.0.
+//    (See accompanying file LICENSE-Boost or copy at
+//     https://www.boost.org/LICENSE_1_0.txt)
+//
+// Unless required by applicable law or agreed to in writing, this software
+// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.
 
 #include "simple_dragonbox.h"
 #include "random_float.h"