diff --git a/resources/l10n/Localizable.strings b/resources/l10n/Localizable.strings
index d6d48e71..9244c9c9 100644
--- a/resources/l10n/Localizable.strings
+++ b/resources/l10n/Localizable.strings
@@ -247,6 +247,9 @@
 /* No comment provided by engineer. */
 "Reset preferences and restart" = "Reset preferences and restart";
 
+/* No comment provided by engineer. */
+"Reset preferences and restart…" = "Reset preferences and restart…";
+
 /* No comment provided by engineer. */
 "Rows of thumbnails:" = "Rows of thumbnails:";
 
@@ -394,5 +397,8 @@
 /* No comment provided by engineer. */
 "Window title truncation:" = "Window title truncation:";
 
+/* No comment provided by engineer. */
+"You can’t undo this action." = "You can’t undo this action.";
+
 /* No comment provided by engineer. */
 "You didn’t write your email, thus can’t receive any response." = "You didn’t write your email, thus can’t receive any response.";
diff --git a/src/ui/preferences-window/tabs/GeneralTab.swift b/src/ui/preferences-window/tabs/GeneralTab.swift
index 993b034a..fccfeb3d 100644
--- a/src/ui/preferences-window/tabs/GeneralTab.swift
+++ b/src/ui/preferences-window/tabs/GeneralTab.swift
@@ -4,7 +4,7 @@ class GeneralTab {
     static func initTab() -> NSView {
         let startAtLogin = LabelAndControl.makeLabelWithCheckbox(NSLocalizedString("Start at login:", comment: ""), "startAtLogin", extraAction: startAtLoginCallback)
         let menubarIcon = LabelAndControl.makeLabelWithDropdown(NSLocalizedString("Menubar icon:", comment: ""), "menubarIcon", MenubarIconPreference.allCases, extraAction: Menubar.menubarIconCallback)
-        let resetPreferences = Button(NSLocalizedString("Reset preferences and restart", comment: "")) { _ in GeneralTab.resetPreferences() }
+        let resetPreferences = Button(NSLocalizedString("Reset preferences and restart…", comment: "")) { _ in GeneralTab.resetPreferences() }
         if #available(OSX 11, *) { resetPreferences.hasDestructiveAction = true }
         let menubarIconDropdown = menubarIcon[1] as! NSPopUpButton
         for i in 0...2 {
@@ -31,8 +31,17 @@ class GeneralTab {
     }
 
     static func resetPreferences() {
-        Preferences.resetAll()
-        App.app.restart()
+        let alert = NSAlert()
+        alert.alertStyle = .critical
+        alert.messageText = ""
+        alert.informativeText = NSLocalizedString("You can’t undo this action.", comment: "")
+        alert.addButton(withTitle: NSLocalizedString("Cancel", comment: ""))
+        let resetButton = alert.addButton(withTitle: NSLocalizedString("Reset preferences and restart", comment: ""))
+        if #available(OSX 11, *) { resetButton.hasDestructiveAction = true }
+        if alert.runModal() == .alertSecondButtonReturn {
+            Preferences.resetAll()
+            App.app.restart()
+        }
     }
 
     /// add/remove plist file in ~/Library/LaunchAgents/ depending on the checkbox state