diff --git a/include/micm/version.hpp b/include/micm/version.hpp
index fd5398ebf..c0ae8410d 100644
--- a/include/micm/version.hpp
+++ b/include/micm/version.hpp
@@ -1,3 +1,5 @@
+// Copyright (C) 2023-2024 National Center for Atmospheric Research
+// SPDX-License-Identifier: Apache-2.0
 // clang-format off
 #pragma once
 
diff --git a/src/version.hpp.in b/src/version.hpp.in
index 0cb11638d..45abc056c 100644
--- a/src/version.hpp.in
+++ b/src/version.hpp.in
@@ -1,3 +1,5 @@
+// Copyright (C) 2023-2024 National Center for Atmospheric Research
+// SPDX-License-Identifier: Apache-2.0
 // clang-format off
 #pragma once