diff --git a/Sources/BuildServerProtocol/InitializeBuild.swift b/Sources/BuildServerProtocol/InitializeBuild.swift
index be7b61a8..48c74840 100644
--- a/Sources/BuildServerProtocol/InitializeBuild.swift
+++ b/Sources/BuildServerProtocol/InitializeBuild.swift
@@ -1,3 +1,14 @@
+//===----------------------------------------------------------------------===//
+//
+// This source file is part of the Swift.org open source project
+//
+// Copyright (c) 2014 - 2019 Apple Inc. and the Swift project authors
+// Licensed under Apache License v2.0 with Runtime Library Exception
+//
+// See https://swift.org/LICENSE.txt for license information
+// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
+//
+//===----------------------------------------------------------------------===//
 import LanguageServerProtocol
 
 /// Like the language server protocol, the initialize request is sent
diff --git a/Sources/BuildServerProtocol/Messages.swift b/Sources/BuildServerProtocol/Messages.swift
index ca981ca8..5380540e 100644
--- a/Sources/BuildServerProtocol/Messages.swift
+++ b/Sources/BuildServerProtocol/Messages.swift
@@ -1,3 +1,14 @@
+//===----------------------------------------------------------------------===//
+//
+// This source file is part of the Swift.org open source project
+//
+// Copyright (c) 2014 - 2019 Apple Inc. and the Swift project authors
+// Licensed under Apache License v2.0 with Runtime Library Exception
+//
+// See https://swift.org/LICENSE.txt for license information
+// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
+//
+//===----------------------------------------------------------------------===//
 import LanguageServerProtocol
 
 fileprivate let requestTypes: [_RequestType.Type] = [
diff --git a/Sources/BuildServerProtocol/ShutdownBuild.swift b/Sources/BuildServerProtocol/ShutdownBuild.swift
index d69e240f..81346476 100644
--- a/Sources/BuildServerProtocol/ShutdownBuild.swift
+++ b/Sources/BuildServerProtocol/ShutdownBuild.swift
@@ -1,3 +1,14 @@
+//===----------------------------------------------------------------------===//
+//
+// This source file is part of the Swift.org open source project
+//
+// Copyright (c) 2014 - 2019 Apple Inc. and the Swift project authors
+// Licensed under Apache License v2.0 with Runtime Library Exception
+//
+// See https://swift.org/LICENSE.txt for license information
+// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
+//
+//===----------------------------------------------------------------------===//
 import LanguageServerProtocol
 
 /// Like the language server protocol, the shutdown build request is
diff --git a/Sources/SKCore/BuildServerBuildSystem.swift b/Sources/SKCore/BuildServerBuildSystem.swift
index 771282a3..4ea26a5d 100644
--- a/Sources/SKCore/BuildServerBuildSystem.swift
+++ b/Sources/SKCore/BuildServerBuildSystem.swift
@@ -1,3 +1,14 @@
+//===----------------------------------------------------------------------===//
+//
+// This source file is part of the Swift.org open source project
+//
+// Copyright (c) 2014 - 2019 Apple Inc. and the Swift project authors
+// Licensed under Apache License v2.0 with Runtime Library Exception
+//
+// See https://swift.org/LICENSE.txt for license information
+// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
+//
+//===----------------------------------------------------------------------===//
 import Basic
 import LanguageServerProtocol
 import LanguageServerProtocolJSONRPC
diff --git a/Tests/SKCoreTests/BuildServerBuildSystemTests.swift b/Tests/SKCoreTests/BuildServerBuildSystemTests.swift
index 77c57573..c16da40e 100644
--- a/Tests/SKCoreTests/BuildServerBuildSystemTests.swift
+++ b/Tests/SKCoreTests/BuildServerBuildSystemTests.swift
@@ -1,3 +1,14 @@
+//===----------------------------------------------------------------------===//
+//
+// This source file is part of the Swift.org open source project
+//
+// Copyright (c) 2014 - 2019 Apple Inc. and the Swift project authors
+// Licensed under Apache License v2.0 with Runtime Library Exception
+//
+// See https://swift.org/LICENSE.txt for license information
+// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
+//
+//===----------------------------------------------------------------------===//
 import XCTest
 import SKCore
 import Basic