diff --git a/config.php b/config.php
index 2e7b686..997257e 100644
--- a/config.php
+++ b/config.php
@@ -6,7 +6,7 @@
 define('MYSQL_DATABASE', 'database');
 define('TWITTER_USERNAME', 'mathias');
 define('GOOGLE_PLUS_ID', '106697091536876736486');
-define('SHORT_URL', 'http://mths.be/'); // include the trailing slash!
-define('DEFAULT_URL', 'http://mathiasbynens.be'); // omit the trailing slash!
+define('SHORT_URL', 'https://mths.be/'); // include the trailing slash!
+define('DEFAULT_URL', 'https://mathiasbynens.be'); // omit the trailing slash!
 
-?>
\ No newline at end of file
+?>