diff --git a/heft-plugins/heft-typescript-plugin/src/TranspilerWorker.ts b/heft-plugins/heft-typescript-plugin/src/TranspilerWorker.ts
index a0f88213eb9..19984ec334a 100644
--- a/heft-plugins/heft-typescript-plugin/src/TranspilerWorker.ts
+++ b/heft-plugins/heft-typescript-plugin/src/TranspilerWorker.ts
@@ -1,6 +1,8 @@
+// Copyright (c) Microsoft Corporation. All rights reserved. Licensed under the MIT license.
+// See LICENSE in the project root for license information.
 import { parentPort, workerData } from 'node:worker_threads';
 
-import * as TTypescript from 'typescript';
+import type * as TTypescript from 'typescript';
 import type {
   ITranspilationErrorMessage,
   ITranspilationRequestMessage,
diff --git a/heft-plugins/heft-typescript-plugin/src/TypeScriptBuilder.ts b/heft-plugins/heft-typescript-plugin/src/TypeScriptBuilder.ts
index 6c9fa6ce566..7dabb6ed718 100644
--- a/heft-plugins/heft-typescript-plugin/src/TypeScriptBuilder.ts
+++ b/heft-plugins/heft-typescript-plugin/src/TypeScriptBuilder.ts
@@ -3,8 +3,10 @@
 
 import * as crypto from 'crypto';
 import * as path from 'path';
+import { Worker } from 'worker_threads';
+
 import * as semver from 'semver';
-import * as TTypescript from 'typescript';
+import type * as TTypescript from 'typescript';
 import {
   type ITerminal,
   JsonFile,
@@ -26,7 +28,6 @@ import type {
   ITypescriptWorkerData
 } from './types';
 import { configureProgramForMultiEmit } from './configureProgramForMultiEmit';
-import { Worker } from 'worker_threads';
 
 export interface ITypeScriptBuilderConfiguration extends ITypeScriptConfigurationJson {
   /**
diff --git a/heft-plugins/heft-typescript-plugin/src/configureProgramForMultiEmit.ts b/heft-plugins/heft-typescript-plugin/src/configureProgramForMultiEmit.ts
index 65b2ebe45f8..6cfbd7cfe6b 100644
--- a/heft-plugins/heft-typescript-plugin/src/configureProgramForMultiEmit.ts
+++ b/heft-plugins/heft-typescript-plugin/src/configureProgramForMultiEmit.ts
@@ -1,3 +1,5 @@
+// Copyright (c) Microsoft Corporation. All rights reserved. Licensed under the MIT license.
+// See LICENSE in the project root for license information.
 import type * as TTypescript from 'typescript';
 import { InternalError } from '@rushstack/node-core-library';
 
diff --git a/heft-plugins/heft-typescript-plugin/src/types.ts b/heft-plugins/heft-typescript-plugin/src/types.ts
index d58f3b4a25c..aea0ee72955 100644
--- a/heft-plugins/heft-typescript-plugin/src/types.ts
+++ b/heft-plugins/heft-typescript-plugin/src/types.ts
@@ -1,3 +1,5 @@
+// Copyright (c) Microsoft Corporation. All rights reserved. Licensed under the MIT license.
+// See LICENSE in the project root for license information.
 import type * as TTypescript from 'typescript';
 
 export interface ITypescriptWorkerData {