diff --git a/.config/qutebrowser/config.py b/.config/qutebrowser/config.py
index 2e90738..a68c7bc 100644
--- a/.config/qutebrowser/config.py
+++ b/.config/qutebrowser/config.py
@@ -7,5 +7,6 @@ config.set('content.notifications', True, 'https://broadsword.s3rv.com')
 config.set('content.notifications', True, 'https://mov.im')
 config.set('content.notifications', True, 'https://xmpp.dreamfall.space')
 config.set('content.register_protocol_handler', True, 'https://mov.im?share/%25s')
+config.set('content.register_protocol_handler', False, 'https://mail.protonmail.com?to=%25s')
 config.set('colors.webpage.prefers_color_scheme_dark', True)
 config.set('content.webgl', False)