diff --git a/dangerzone/gui/updater.py b/dangerzone/gui/updater.py
index 0254bca..ecc85d6 100644
--- a/dangerzone/gui/updater.py
+++ b/dangerzone/gui/updater.py
@@ -76,7 +76,7 @@ class UpdaterThread(QtCore.QThread):
     whoever has connected to it.
     """
 
-    finished = QtCore.Signal(dict)
+    finished = QtCore.Signal(UpdateReport)
 
     GH_RELEASE_URL = (
         "https://api.github.com/repos/freedomofpress/dangerzone/releases/latest"