diff --git a/Sources/Requests.swift b/Sources/Requests.swift
index 0e5f3bd..fbfc0a8 100644
--- a/Sources/Requests.swift
+++ b/Sources/Requests.swift
@@ -235,6 +235,21 @@ public enum Requests {
         public typealias Response = ResponseWithValue<String>
     }
 
+    public struct SessionTimeouts: Request {
+        public var session: String
+        public var type: String
+        public var ms: Double
+
+        public var pathComponents: [String] { ["session", session, "timeouts"] }
+        public var method: HTTPMethod { .post }
+        public var body: Body { .init(type: type, ms: ms) }
+
+        public struct Body: Codable {
+            public var type: String
+            public var ms: Double
+        }
+    }
+
     public struct SessionTitle: Request {
         public var session: String
 
diff --git a/Sources/Session.swift b/Sources/Session.swift
index 45e012a..131497d 100644
--- a/Sources/Session.swift
+++ b/Sources/Session.swift
@@ -33,6 +33,13 @@ public class Session {
         }
     }
 
+    /// Sets a a timeout value on this session.
+    /// https://www.selenium.dev/documentation/legacy/json_wire_protocol/#sessionsessionidtimeouts
+    public func setTimeout(type: String, duration: TimeInterval) throws {
+        try webDriver.send(
+            Requests.SessionTimeouts(session: id, type: type, ms: duration * 1000))
+    }
+
     /// screenshot()
     /// Take a screenshot of the current page.
     /// - Returns: The screenshot data as a PNG file.
diff --git a/Sources/TimeoutType.swift b/Sources/TimeoutType.swift
new file mode 100644
index 0000000..a4146e3
--- /dev/null
+++ b/Sources/TimeoutType.swift
@@ -0,0 +1,5 @@
+public enum TimeoutType {
+    public static let script = "script"
+    public static let implicitWait = "implicit"
+    public static let pageLoad = "page load"
+}
\ No newline at end of file
diff --git a/Tests/WebDriverTests/TimeoutTests.swift b/Tests/WebDriverTests/TimeoutTests.swift
new file mode 100644
index 0000000..d159c12
--- /dev/null
+++ b/Tests/WebDriverTests/TimeoutTests.swift
@@ -0,0 +1,55 @@
+@testable import WebDriver
+import XCTest
+
+class TimeoutTests: XCTestCase {
+    private static var _winAppDriver: Result<WinAppDriver, any Error>!
+    public var winAppDriver: WinAppDriver! { try? Self._winAppDriver.get() }
+
+    public override class func setUp() {
+        _winAppDriver = Result { try WinAppDriver() }
+    }
+
+    public override class func tearDown() {
+        _winAppDriver = nil
+    }
+
+    public override func setUpWithError() throws {
+        try XCTSkipIf(winAppDriver == nil)
+    }
+
+    func startApp() throws -> Session {
+        // Use a simple app in which we can expect queries to execute quickly
+        let windowsDir = ProcessInfo.processInfo.environment["SystemRoot"]!
+        let capabilities = WinAppDriver.Capabilities(app: "\(windowsDir)\\System32\\winver.exe")
+        return try Session(webDriver: winAppDriver, desiredCapabilities: capabilities)
+    }
+
+    static func time(_ callback: () throws -> Void) rethrows -> Double {
+        let before = DispatchTime.now()
+        try callback()
+        let after = DispatchTime.now()
+        return Double(after.uptimeNanoseconds - before.uptimeNanoseconds) / 1_000_000_000
+    }
+
+    public func testLibraryImplicitWait() throws {
+        let session = try startApp()
+
+        // Test library timeout implementation
+        session.defaultRetryTimeout = 1
+        XCTAssert(try Self.time({ _ = try session.findElement(byAccessibilityId: "IdThatDoesNotExist") }) > 0.5)
+
+        session.defaultRetryTimeout = 0
+        XCTAssert(try Self.time({ _ = try session.findElement(byAccessibilityId: "IdThatDoesNotExist") }) < 0.5)
+    }
+
+    public func testWebDriverImplicitWait() throws {
+        let session = try startApp()
+        session.defaultRetryTimeout = 0
+
+        try session.setTimeout(type: TimeoutType.implicitWait, duration: 1)
+        XCTAssert(try Self.time({ _ = try session.findElement(byAccessibilityId: "IdThatDoesNotExist") }) > 0.5)
+
+        try session.setTimeout(type: TimeoutType.implicitWait, duration: 0)
+        XCTAssert(try Self.time({ _ = try session.findElement(byAccessibilityId: "IdThatDoesNotExist") }) < 0.5)
+    }
+}