diff --git a/LightweightCharts/Classes/Implementations/API/Chart.swift b/LightweightCharts/Classes/Implementations/API/Chart.swift
index c4d30dd..036fc41 100644
--- a/LightweightCharts/Classes/Implementations/API/Chart.swift
+++ b/LightweightCharts/Classes/Implementations/API/Chart.swift
@@ -1,7 +1,7 @@
 import Foundation
 import WebKit
 
-public protocol ChartDelegate: class {
+public protocol ChartDelegate: AnyObject {
     
     func didClick(onChart chart: ChartApi, parameters: MouseEventParams)
     func didCrosshairMove(onChart chart: ChartApi, parameters: MouseEventParams)
diff --git a/LightweightCharts/Classes/Implementations/API/LightweightCharts.swift b/LightweightCharts/Classes/Implementations/API/LightweightCharts.swift
index 6fa132d..c213c1a 100644
--- a/LightweightCharts/Classes/Implementations/API/LightweightCharts.swift
+++ b/LightweightCharts/Classes/Implementations/API/LightweightCharts.swift
@@ -1,7 +1,7 @@
 import Foundation
 import WebKit
 
-public protocol LightweightChartsDelegate: class {
+public protocol LightweightChartsDelegate: AnyObject {
     
     func lightweightChartsDidLoad(_ lightweightCharts: LightweightCharts)
     func lightweightCharts(_ lightweightCharts: LightweightCharts, didFailLoadWithError error: Error)
diff --git a/LightweightCharts/Classes/Implementations/JavaScriptEvaluator.swift b/LightweightCharts/Classes/Implementations/JavaScriptEvaluator.swift
index 62b3f41..0d0f7e0 100644
--- a/LightweightCharts/Classes/Implementations/JavaScriptEvaluator.swift
+++ b/LightweightCharts/Classes/Implementations/JavaScriptEvaluator.swift
@@ -1,7 +1,7 @@
 import Foundation
 import WebKit
 
-protocol JavaScriptEvaluator: class {
+protocol JavaScriptEvaluator: AnyObject {
     
     func evaluateScript(_ script: String, completion: ((Any?, Error?) -> Void)?)
     func decodedResult<T: Decodable>(forScript script: String, completion: @escaping (T?) -> Void)
diff --git a/LightweightCharts/Classes/Implementations/JavaScriptObject.swift b/LightweightCharts/Classes/Implementations/JavaScriptObject.swift
index 796466d..65fa1bf 100644
--- a/LightweightCharts/Classes/Implementations/JavaScriptObject.swift
+++ b/LightweightCharts/Classes/Implementations/JavaScriptObject.swift
@@ -1,4 +1,4 @@
-protocol JavaScriptObject: class {
+protocol JavaScriptObject: AnyObject {
     
     var jsName: String { get }
     
diff --git a/LightweightCharts/Classes/Implementations/Subscription/MessageHandler.swift b/LightweightCharts/Classes/Implementations/Subscription/MessageHandler.swift
index acc8685..fe0ecee 100644
--- a/LightweightCharts/Classes/Implementations/Subscription/MessageHandler.swift
+++ b/LightweightCharts/Classes/Implementations/Subscription/MessageHandler.swift
@@ -1,7 +1,7 @@
 import Foundation
 import WebKit
 
-protocol MessageHandlerDelegate: class {
+protocol MessageHandlerDelegate: AnyObject {
     
     func messageHandler(_ messageHandler: MessageHandler,
                         didReceiveClickWithParameters parameters: MouseEventParams)
diff --git a/LightweightCharts/Classes/Implementations/SyncScriptEvaluating/PromptHandler.swift b/LightweightCharts/Classes/Implementations/SyncScriptEvaluating/PromptHandler.swift
index 1725e0e..370079f 100644
--- a/LightweightCharts/Classes/Implementations/SyncScriptEvaluating/PromptHandler.swift
+++ b/LightweightCharts/Classes/Implementations/SyncScriptEvaluating/PromptHandler.swift
@@ -1,7 +1,7 @@
 import Foundation
 import WebKit
 
-protocol ClosuresStore: class {
+protocol ClosuresStore: AnyObject {
         
     func addMethod<Input, Output>(_ method: JavaScriptMethod<Input, Output>, forName name: String)
     
diff --git a/LightweightCharts/Classes/Implementations/WebView.swift b/LightweightCharts/Classes/Implementations/WebView.swift
index 4aad7c0..fb4098a 100644
--- a/LightweightCharts/Classes/Implementations/WebView.swift
+++ b/LightweightCharts/Classes/Implementations/WebView.swift
@@ -1,6 +1,6 @@
 import WebKit
 
-public protocol JavaScriptErrorDelegate: class {
+public protocol JavaScriptErrorDelegate: AnyObject {
     
     func didFailEvaluateScript(_ script: String, withError error: Error)
     
diff --git a/LightweightCharts/Classes/Protocols/ChartApi.swift b/LightweightCharts/Classes/Protocols/ChartApi.swift
index 6806ebe..98ccd6f 100644
--- a/LightweightCharts/Classes/Protocols/ChartApi.swift
+++ b/LightweightCharts/Classes/Protocols/ChartApi.swift
@@ -3,7 +3,7 @@ import UIKit
  /**
  The main interface of a single chart
  */
-public protocol ChartApi: class {
+public protocol ChartApi: AnyObject {
     
     /**
      * Subsription delegate for chart events. Weak reference.
diff --git a/LightweightCharts/Classes/Protocols/PriceFormatterApi.swift b/LightweightCharts/Classes/Protocols/PriceFormatterApi.swift
index 4c103fe..73100ff 100644
--- a/LightweightCharts/Classes/Protocols/PriceFormatterApi.swift
+++ b/LightweightCharts/Classes/Protocols/PriceFormatterApi.swift
@@ -1,7 +1,7 @@
 import Foundation
 
 /** Interface to be implemented by the object in order to be used as a price formatter */
-public protocol PriceFormatterApi: class {
+public protocol PriceFormatterApi: AnyObject {
     
     /**
      * Formatting function
diff --git a/LightweightCharts/Classes/Protocols/PriceLineApi.swift b/LightweightCharts/Classes/Protocols/PriceLineApi.swift
index 5de453c..5067c19 100644
--- a/LightweightCharts/Classes/Protocols/PriceLineApi.swift
+++ b/LightweightCharts/Classes/Protocols/PriceLineApi.swift
@@ -1,6 +1,6 @@
 import Foundation
 
-public protocol PriceLineApi: class {
+public protocol PriceLineApi: AnyObject {
     
     func applyOptions(options: PriceLineOptions)
     func options(completion: @escaping (PriceLineOptions?) -> Void)
diff --git a/LightweightCharts/Classes/Protocols/PriceScaleApi.swift b/LightweightCharts/Classes/Protocols/PriceScaleApi.swift
index 5f6ad5e..a792e3a 100644
--- a/LightweightCharts/Classes/Protocols/PriceScaleApi.swift
+++ b/LightweightCharts/Classes/Protocols/PriceScaleApi.swift
@@ -1,7 +1,7 @@
 import Foundation
 
 /** Interface to control chart's price scale */
-public protocol PriceScaleApi: class {
+public protocol PriceScaleApi: AnyObject {
     
     /**
      * Applies new options to the price scale
diff --git a/LightweightCharts/Classes/Protocols/SeriesApi.swift b/LightweightCharts/Classes/Protocols/SeriesApi.swift
index 385ec78..1c9d421 100644
--- a/LightweightCharts/Classes/Protocols/SeriesApi.swift
+++ b/LightweightCharts/Classes/Protocols/SeriesApi.swift
@@ -1,6 +1,6 @@
 import Foundation
 
-public protocol SeriesApi: class {
+public protocol SeriesApi: AnyObject {
        
     associatedtype Options: SeriesOptionsCommon
     associatedtype TickValue: SeriesData
diff --git a/LightweightCharts/Classes/Protocols/TimeScaleApi.swift b/LightweightCharts/Classes/Protocols/TimeScaleApi.swift
index 2e4dd97..d738d3f 100644
--- a/LightweightCharts/Classes/Protocols/TimeScaleApi.swift
+++ b/LightweightCharts/Classes/Protocols/TimeScaleApi.swift
@@ -1,7 +1,7 @@
 import CoreGraphics
 
 /** Interface to chart time scale */
-public protocol TimeScaleApi: class {
+public protocol TimeScaleApi: AnyObject {
     
     var delegate: TimeScaleDelegate? { get set }