diff --git a/Example/GradientLoadingBar/NavigationBarExampleViewController.swift b/Example/GradientLoadingBar/NavigationBarExampleViewController.swift
index 25143ed..8eff259 100644
--- a/Example/GradientLoadingBar/NavigationBarExampleViewController.swift
+++ b/Example/GradientLoadingBar/NavigationBarExampleViewController.swift
@@ -16,7 +16,7 @@ class NavigationBarExampleViewController: UIViewController {
 
     // MARK: - Private properties
 
-    private var gradientProgressIndicatorView = GradientActivityIndicatorView()
+    private let gradientProgressIndicatorView = GradientActivityIndicatorView()
 
     // MARK: - Public methods