diff --git a/Sources/OpenAPIURLSession/URLSessionTransport.swift b/Sources/OpenAPIURLSession/URLSessionTransport.swift
index bf10e5b..eadddb6 100644
--- a/Sources/OpenAPIURLSession/URLSessionTransport.swift
+++ b/Sources/OpenAPIURLSession/URLSessionTransport.swift
@@ -52,7 +52,7 @@ import Foundation
 /// The ``URLSessionTransport/Configuration-swift.struct`` type allows you to
 /// provide a custom URLSession and tweak behaviors such as the default
 /// timeouts, authentication challenges, and more.
-public struct URLSessionTransport {
+public struct URLSessionTransport: ClientTransport {
 
     /// A set of configuration values for the URLSession transport.
     public struct Configuration: Sendable {
diff --git a/Tests/OpenAPIURLSessionTests/URLSessionTransportTests.swift b/Tests/OpenAPIURLSessionTests/URLSessionTransportTests.swift
index faf0891..8b9d2bd 100644
--- a/Tests/OpenAPIURLSessionTests/URLSessionTransportTests.swift
+++ b/Tests/OpenAPIURLSessionTests/URLSessionTransportTests.swift
@@ -59,7 +59,7 @@ class URLSessionTransportTests: XCTestCase {
                 body: Data("👋".utf8)
             )
         )
-        let transport = URLSessionTransport(
+        let transport: ClientTransport = URLSessionTransport(
             configuration: .init(session: MockURLProtocol.mockURLSession)
         )
         let request = OpenAPIRuntime.Request(