diff --git a/CHANGES.rst b/CHANGES.rst
index 5af0d3a..f157553 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -4,6 +4,7 @@ Changes
 0.3.0.dev
 ---------
 
+- Fix dark mode alert style #137
 - Notifications: fixes, cleanup, and tests #131
 - Fix slider for some older macOS versions (10.11 and before?)
 - Keyboard interrupts now stop a running application
diff --git a/rumps/rumps.py b/rumps/rumps.py
index 77a56df..d8f8404 100644
--- a/rumps/rumps.py
+++ b/rumps/rumps.py
@@ -75,6 +75,7 @@ def alert(title=None, message='', ok=None, cancel=None, other=None, icon_path=No
         cancel = 'Cancel' if cancel else None
     alert = NSAlert.alertWithMessageText_defaultButton_alternateButton_otherButton_informativeTextWithFormat_(
         title, ok, cancel, other, message)
+    alert.window().setAppearance_(AppKit.NSAppearance.currentAppearance())
     alert.setAlertStyle_(0)  # informational style
     if icon_path is not None:
         icon = _nsimage_from_file(icon_path)
@@ -846,6 +847,7 @@ def run(self):
         :return: a :class:`rumps.rumps.Response` object that contains the text and the button clicked as an integer.
         """
         _log(self)
+        self._alert.window().setAppearance_(AppKit.NSAppearance.currentAppearance())
         clicked = self._alert.runModal() % 999
         if clicked > 2 and self._cancel:
             clicked -= 1