diff --git a/src/pyj/book_list/top_bar.pyj b/src/pyj/book_list/top_bar.pyj
index 6229d07dff..7424ba64ba 100644
--- a/src/pyj/book_list/top_bar.pyj
+++ b/src/pyj/book_list/top_bar.pyj
@@ -66,7 +66,7 @@ def set_left_data(container, title='calibre', icon='heart', action=None, tooltip
                     animation_iteration_count='5', animation_play_state='running' if run_animation else 'paused'
                 )
                 set_css(a.firstChild, color=get_color('heart'))
-                a.setAttribute('href', 'http://calibre-ebook.com/donate')
+                a.setAttribute('href', 'https://calibre-ebook.com/donate')
                 a.setAttribute('target', 'donate-to-calibre')
             if action is not None:
                 a.addEventListener('click', def(event): event.preventDefault(), action();)