diff --git a/.gitignore b/.gitignore
index 032504a8..9555db0d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -15,4 +15,3 @@ env/
 *.log
 temp-landing-page/
 .env*.local
-next-env.d.ts
diff --git a/portal/server/next-env.d.ts b/portal/server/next-env.d.ts
index 40c3d680..08ecd213 100644
--- a/portal/server/next-env.d.ts
+++ b/portal/server/next-env.d.ts
@@ -1,3 +1,6 @@
+// Copyright (c) Mysten Labs, Inc.
+// SPDX-License-Identifier: Apache-2.0
+
 /// <reference types="next" />
 /// <reference types="next/image-types/global" />