diff --git a/Sources/Spry/Spyable.swift b/Sources/Spry/Spyable.swift
index 47b3db5..534b90a 100644
--- a/Sources/Spry/Spyable.swift
+++ b/Sources/Spry/Spyable.swift
@@ -22,7 +22,7 @@ private var callsMapTable: NSMapTable<AnyObject, RecordedCallsDictionary> = NSMa
  
  - Note: The `Spryable` protocol exists as a convenience to conform to both `Spyable` and `Stubbable` at the same time.
  */
-public protocol Spyable: class {
+public protocol Spyable: AnyObject {
 
     // MARK: Instance
 
diff --git a/Sources/Spry/Stubbable.swift b/Sources/Spry/Stubbable.swift
index 1f057d4..a7fb6f5 100644
--- a/Sources/Spry/Stubbable.swift
+++ b/Sources/Spry/Stubbable.swift
@@ -22,7 +22,7 @@ private var stubsMapTable: NSMapTable<AnyObject, StubsDictionary> = NSMapTable.w
 
  - Note: The `Spryable` protocol exists as a convenience to conform to both `Spyable` and `Stubbable` at the same time.
  */
-public protocol Stubbable: class {
+public protocol Stubbable: AnyObject {
 
     // MARK: - Instance