diff --git a/src/calibre/gui2/dialogs/plugin_updater.py b/src/calibre/gui2/dialogs/plugin_updater.py
index c5d79218f9..0b0885dc82 100644
--- a/src/calibre/gui2/dialogs/plugin_updater.py
+++ b/src/calibre/gui2/dialogs/plugin_updater.py
@@ -276,6 +276,7 @@ class DisplayPluginSortFilterModel(QSortFilterProxyModel):
     def __init__(self, parent):
         QSortFilterProxyModel.__init__(self, parent)
         self.setSortRole(Qt.UserRole)
+        self.setSortCaseSensitivity(Qt.CaseInsensitive)
         self.filter_criteria = FILTER_ALL
 
     def filterAcceptsRow(self, sourceRow, sourceParent):