diff --git a/Sources/AWSLambdaRuntime/ControlPlaneRequestEncoder.swift b/Sources/AWSLambdaRuntime/ControlPlaneRequestEncoder.swift
index 5848ec76..84f0cf0e 100644
--- a/Sources/AWSLambdaRuntime/ControlPlaneRequestEncoder.swift
+++ b/Sources/AWSLambdaRuntime/ControlPlaneRequestEncoder.swift
@@ -93,7 +93,7 @@ struct ControlPlaneRequestEncoder: _EmittingChannelHandler {
 extension String {
     static let CRLF: String = "\r\n"
 
-    static let userAgent = "Swift-Lambda/Unknown"
+    static let userAgent = "Swift-Lambda/\(Version.current)"
     static let userAgentHeader: String = "user-agent: \(userAgent)\r\n"
     static let unhandledErrorHeader: String = "lambda-runtime-function-error-type: Unhandled\r\n"
 
diff --git a/Sources/AWSLambdaRuntime/Version.swift b/Sources/AWSLambdaRuntime/Version.swift
new file mode 100644
index 00000000..f55c30f1
--- /dev/null
+++ b/Sources/AWSLambdaRuntime/Version.swift
@@ -0,0 +1,25 @@
+//===----------------------------------------------------------------------===//
+//
+// This source file is part of the SwiftAWSLambdaRuntime open source project
+//
+// Copyright (c) 2017-2018 Apple Inc. and the SwiftAWSLambdaRuntime project authors
+// Licensed under Apache License v2.0
+//
+// See LICENSE.txt for license information
+// See CONTRIBUTORS.txt for the list of SwiftAWSLambdaRuntime project authors
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+//===----------------------------------------------------------------------===//
+
+/// The version of the AWS Lambda Runtime.
+///
+/// This is used in the User Agent header when making requests to the AWS Lambda data Plane.
+///
+/// - Note: This is a static property that returns the current version of the AWS Lambda Runtime.
+///         It is used to ensure that the runtime can be identified by the AWS Lambda service.
+///         As such, we mainly care about major version and minor version. Patch and pre-release versions are ignored.
+package enum Version {
+    /// The current version of the AWS Lambda Runtime.
+    package static let current = "2.0"
+}