diff --git a/OutRun/Protocols/WorkoutBuilder/WorkoutBuilderDelegate.swift b/OutRun/Protocols/WorkoutBuilder/WorkoutBuilderDelegate.swift
index 613a4b08..c15b7fe7 100644
--- a/OutRun/Protocols/WorkoutBuilder/WorkoutBuilderDelegate.swift
+++ b/OutRun/Protocols/WorkoutBuilder/WorkoutBuilderDelegate.swift
@@ -21,7 +21,7 @@
 import Foundation
 import CoreLocation
 
-protocol WorkoutBuilderDelegate: class {
+protocol WorkoutBuilderDelegate: AnyObject {
     
     func didUpdate(distanceMeasurement: NSMeasurement)
     func didUpdate(durationMeasurement: NSMeasurement)