diff --git a/Calendr/Assets/Generated/Strings.generated.swift b/Calendr/Assets/Generated/Strings.generated.swift
index d4b119c9..21ec8029 100644
--- a/Calendr/Assets/Generated/Strings.generated.swift
+++ b/Calendr/Assets/Generated/Strings.generated.swift
@@ -10,6 +10,10 @@ import Foundation
 // swiftlint:disable explicit_type_interface function_parameter_count identifier_name line_length
 // swiftlint:disable nesting type_body_length type_name vertical_whitespace_opening_braces
 internal enum Strings {
+  /// New version available: %@
+  internal static func newVersion(_ p1: Any) -> String {
+    return Strings.tr("Localizable", "new_version", String(describing: p1), fallback: "New version available: %@")
+  }
   /// Localizable.strings
   ///   Calendr
   /// 
diff --git a/Calendr/Assets/de.lproj/Localizable.strings b/Calendr/Assets/de.lproj/Localizable.strings
index 89a94cab..d20a7693 100644
--- a/Calendr/Assets/de.lproj/Localizable.strings
+++ b/Calendr/Assets/de.lproj/Localizable.strings
@@ -7,6 +7,7 @@
 
 "quit" = "Programm beenden";
 "search" = "Suchen";
+"new_version" = "Neue Version verfügbar: %@";
 
 "settings.title" = "Einstellungen";
 "settings.tab.general" = "Allgemein";
diff --git a/Calendr/Assets/en.lproj/Localizable.strings b/Calendr/Assets/en.lproj/Localizable.strings
index 1f9045cd..1b50ba3f 100644
--- a/Calendr/Assets/en.lproj/Localizable.strings
+++ b/Calendr/Assets/en.lproj/Localizable.strings
@@ -7,6 +7,7 @@
 
 "quit" = "Quit";
 "search" = "Search";
+"new_version" = "New version available: %@";
 
 "settings.title" = "Preferences";
 "settings.tab.general" = "General";
diff --git a/Calendr/Assets/es.lproj/Localizable.strings b/Calendr/Assets/es.lproj/Localizable.strings
index 502e1050..180285ec 100644
--- a/Calendr/Assets/es.lproj/Localizable.strings
+++ b/Calendr/Assets/es.lproj/Localizable.strings
@@ -7,6 +7,7 @@
 
 "quit" = "Salir";
 "search" = "Buscar";
+"new_version" = "Nueva versión disponible: %@";
 
 "settings.title" = "Preferencias";
 "settings.tab.general" = "General";
diff --git a/Calendr/Assets/fr.lproj/Localizable.strings b/Calendr/Assets/fr.lproj/Localizable.strings
index 2433e2fc..1f21fbd0 100644
--- a/Calendr/Assets/fr.lproj/Localizable.strings
+++ b/Calendr/Assets/fr.lproj/Localizable.strings
@@ -7,6 +7,7 @@
 
 "quit" = "Quitter";
 "search" = "Rechercher";
+"new_version" = "Nouvelle version disponible: %@";
 
 "settings.title" = "Préférences";
 "settings.tab.general" = "Général";
diff --git a/Calendr/Assets/it.lproj/Localizable.strings b/Calendr/Assets/it.lproj/Localizable.strings
index 5251c000..64d5e7ee 100644
--- a/Calendr/Assets/it.lproj/Localizable.strings
+++ b/Calendr/Assets/it.lproj/Localizable.strings
@@ -7,6 +7,7 @@
 
 "quit" = "Esci";
 "search" = "Cerca";
+"new_version" = "Nuova versione disponibile: %@";
 
 "settings.title" = "Preferenze";
 "settings.tab.general" = "Generali";
diff --git a/Calendr/Assets/pt.lproj/Localizable.strings b/Calendr/Assets/pt.lproj/Localizable.strings
index 7fb93514..eb9d852a 100644
--- a/Calendr/Assets/pt.lproj/Localizable.strings
+++ b/Calendr/Assets/pt.lproj/Localizable.strings
@@ -7,6 +7,7 @@
 
 "quit" = "Sair";
 "search" = "Buscar";
+"new_version" = "Nova versão disponível: %@";
 
 "settings.title" = "Preferências";
 "settings.tab.general" = "Geral";
diff --git a/Calendr/Config/Calendr.entitlements b/Calendr/Config/Calendr.entitlements
index d9120b5a..498d6171 100644
--- a/Calendr/Config/Calendr.entitlements
+++ b/Calendr/Config/Calendr.entitlements
@@ -6,6 +6,8 @@
 	<true/>
 	<key>com.apple.security.files.user-selected.read-only</key>
 	<true/>
+	<key>com.apple.security.network.client</key>
+	<true/>
 	<key>com.apple.security.personal-information.calendars</key>
 	<true/>
 	<key>com.apple.security.temporary-exception.apple-events</key>
diff --git a/Calendr/Settings/AboutViewController.swift b/Calendr/Settings/AboutViewController.swift
index 435c2d00..3ef80f8f 100644
--- a/Calendr/Settings/AboutViewController.swift
+++ b/Calendr/Settings/AboutViewController.swift
@@ -6,11 +6,14 @@
 //
 
 import Cocoa
+import UserNotifications
 
-class AboutViewController: NSViewController {
+class AboutViewController: NSViewController, UNUserNotificationCenterDelegate {
 
     private let quitButton: NSButton
     private let linkView: NSTextView
+    private let newVersionButton: NSButton
+    private let appVersion = "v\(BuildConfig.appVersion)"
 
     init() {
         quitButton = NSButton(title: Strings.quit, target: NSApp, action: #selector(NSApp.terminate))
@@ -26,23 +29,38 @@ class AboutViewController: NSViewController {
         linkView.alignment = .center
         linkView.height(equalTo: 15)
 
+        newVersionButton = NSButton()
+
         super.init(nibName: nil, bundle: nil)
 
+        newVersionButton.target = self
+        newVersionButton.action = #selector(openReleasePage)
+        newVersionButton.refusesFirstResponder = true
+        newVersionButton.bezelStyle = .roundRect
+
         setUpAccessibility()
+        setUpReleaseCheck()
     }
 
     override func loadView() {
 
+        if let version = UserDefaults.standard.string(forKey: Prefs.lastCheckedVersion), version != appVersion {
+            showNewVersionButton(Strings.newVersion(version))
+        } else {
+            newVersionButton.isHidden = true
+        }
+
         view = NSStackView(views: [
             Label(text: "Calendr", font: .systemFont(ofSize: 16, weight: .semibold), align: .center),
             .spacer(height: 0),
-            Label(text: "v\(BuildConfig.appVersion)", font: .systemFont(ofSize: 13), align: .center),
+            Label(text: appVersion, font: .systemFont(ofSize: 13), align: .center),
             Label(text: "\(BuildConfig.date) - \(BuildConfig.time)", color: .secondaryLabelColor, align: .center),
             .spacer(height: 4),
             Label(text: #"¯\_(ツ)_/¯"#, font: .systemFont(ofSize: 16), align: .center),
             .spacer(height: 4),
             Label(text: "© 2020 - \(BuildConfig.date.suffix(4)) Carlos Enumo", align: .center),
             linkView,
+            newVersionButton,
             .spacer(height: 4),
             quitButton
         ])
@@ -50,7 +68,7 @@ class AboutViewController: NSViewController {
         .with(orientation: .vertical)
     }
 
-    func setUpAccessibility() {
+    private func setUpAccessibility() {
 
         guard BuildConfig.isUITesting else { return }
 
@@ -62,6 +80,84 @@ class AboutViewController: NSViewController {
         quitButton.setAccessibilityIdentifier(Accessibility.Settings.About.quitBtn)
     }
 
+    private func setUpReleaseCheck() {
+        UNUserNotificationCenter.current().delegate = self
+        UNUserNotificationCenter.current().requestAuthorization(options: [.alert, .sound]) { (granted, error) in
+            guard granted else { return }
+            self.checkRelease()
+            DispatchQueue.main.async {
+                Timer.scheduledTimer(
+                    withTimeInterval: 60 * 60,
+                    repeats: true
+                ) { _ in
+                    DispatchQueue.global().async {
+                        self.checkRelease()
+                    }
+                }
+            }
+        }
+    }
+
+    private func showNewVersionButton(_ title: String) {
+        newVersionButton.title = title
+        newVersionButton.isHidden = false
+    }
+
+    private func checkRelease() {
+        do {
+            let url = "https://api.github.com/repos/pakerwreah/Calendr/releases/latest"
+            let data = try Data(contentsOf: URL(string: url)!)
+            guard
+                let json = try JSONSerialization.jsonObject(with: data) as? [String: Any],
+                let version = json["name"] as? String
+            else { return }
+
+            guard version != appVersion else {
+                DispatchQueue.main.async {
+                    self.newVersionButton.isHidden = true
+                }
+                UserDefaults.standard.set(version, forKey: Prefs.lastCheckedVersion)
+                return
+            }
+
+            guard version != UserDefaults.standard.string(forKey: Prefs.lastCheckedVersion) else { return }
+
+            let message = Strings.newVersion(version)
+
+            DispatchQueue.main.async {
+                self.showNewVersionButton(message)
+            }
+
+            let content = UNMutableNotificationContent()
+            content.title = message
+            content.sound = .default
+
+            UNUserNotificationCenter.current().add(
+                UNNotificationRequest(
+                    identifier: UUID().uuidString,
+                    content: content,
+                    trigger: nil
+                )
+            ) { error in
+                if let error {
+                    print(error.localizedDescription)
+                    return
+                }
+                UserDefaults.standard.set(version, forKey: Prefs.lastCheckedVersion)
+            }
+        } catch {
+            print(error.localizedDescription)
+        }
+    }
+
+    @objc private func openReleasePage() {
+        NSWorkspace.shared.open(URL(string: "https://github.com/pakerwreah/Calendr/releases/latest")!)
+    }
+
+    func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse) async {
+        openReleasePage()
+    }
+
     required init?(coder: NSCoder) {
         fatalError("init(coder:) has not been implemented")
     }
diff --git a/Calendr/Settings/Prefs+UserDefaults.swift b/Calendr/Settings/Prefs+UserDefaults.swift
index 45231812..6e2eea09 100644
--- a/Calendr/Settings/Prefs+UserDefaults.swift
+++ b/Calendr/Settings/Prefs+UserDefaults.swift
@@ -26,6 +26,7 @@ enum Prefs {
     static let transparencyLevel = "transparency_level"
     static let calendarScaling = "calendar_scaling"
     static let highlightedWeekdays = "highlighted_weekdays"
+    static let lastCheckedVersion = "last_checked_version"
 }
 
 extension UserDefaults {