diff --git a/TUM Campus App/AvatarNavigationBar.swift b/TUM Campus App/AvatarNavigationBar.swift
index 6d60d242..d650b43e 100644
--- a/TUM Campus App/AvatarNavigationBar.swift	
+++ b/TUM Campus App/AvatarNavigationBar.swift	
@@ -14,7 +14,7 @@ import XMLCoder
 fileprivate let sessionManager = Session.defaultSession
 fileprivate let cacheKey = "avatar"
 
-protocol ProfileImageSettable: class {
+protocol ProfileImageSettable: AnyObject {
     var profileImage: UIImage? { get set }
 }
 
diff --git a/TUM Campus App/Entity/DecoderProtocol.swift b/TUM Campus App/Entity/DecoderProtocol.swift
index deaad199..d2ab5678 100644
--- a/TUM Campus App/Entity/DecoderProtocol.swift	
+++ b/TUM Campus App/Entity/DecoderProtocol.swift	
@@ -10,7 +10,7 @@ import Foundation
 import XMLCoder
 import Alamofire
 
-protocol DecoderProtocol: class, DataDecoder {
+protocol DecoderProtocol: AnyObject, DataDecoder {
     associatedtype DateDecodingStrategy: DecodingStrategyProtocol
     func decode<T>(_ type: T.Type, from data: Data) throws -> T where T : Decodable
     var userInfo: [CodingUserInfoKey : Any] { get set }
diff --git a/TUM Campus App/Extensions/Extensions.swift b/TUM Campus App/Extensions/Extensions.swift
index 13ffc3d3..85bea9ba 100644
--- a/TUM Campus App/Extensions/Extensions.swift	
+++ b/TUM Campus App/Extensions/Extensions.swift	
@@ -121,7 +121,7 @@ extension Session {
 }
 
 
-protocol SupportsBackgroundLabel: class {
+protocol SupportsBackgroundLabel: AnyObject {
     var backgroundView: UIView? { get set }
 }