diff --git a/config_panel.toml b/config_panel.toml
index 7403786..29a4b67 100644
--- a/config_panel.toml
+++ b/config_panel.toml
@@ -10,5 +10,5 @@ name = "Element configuration"
         ask = "Choose a home server"
         type = "url"
         default = "https://matrix-client.matrix.org"
-        pattern.regexp = 'https://'
+        pattern.regexp = '^https://$'
         bind = "base_url:__FINALPATH__/config.json"