diff --git a/dangerzone/gui/updater.py b/dangerzone/gui/updater.py
index 9190b8d..037f2aa 100644
--- a/dangerzone/gui/updater.py
+++ b/dangerzone/gui/updater.py
@@ -72,6 +72,7 @@ class UpdateCheckPrompt(Alert):
         assert self.cancel_button is not None
         buttons_layout.addWidget(self.cancel_button)
         buttons_layout.addWidget(self.ok_button)
+        self.ok_button.setDefault(True)
         return buttons_layout