diff --git a/RELEASE.md b/RELEASE.md
index db2ee89..150b3546 100644
--- a/RELEASE.md
+++ b/RELEASE.md
@@ -1,3 +1,12 @@
+# v1.3.1 #
+
+- No new features
+
+## Bugfixes ##
+
+- Don't specify a domain when setting cookies. This allows 411 to work when the hostname doesn't match the site configuration.
+
+
 # v1.3.0 #
 
 - Support for ES5.0
diff --git a/phplib/411bootstrap.php b/phplib/411bootstrap.php
index 4fbe5d9..1e68b08 100644
--- a/phplib/411bootstrap.php
+++ b/phplib/411bootstrap.php
@@ -20,7 +20,7 @@
 date_default_timezone_set("UTC");
 
 define('BASE_DIR', realpath(__DIR__ . '/..'));
-define('VERSION', '1.3.0');
+define('VERSION', '1.3.1');
 
 // Set up autoloader for our classes.
 spl_autoload_register(function($class) {
diff --git a/phplib/Cookie.php b/phplib/Cookie.php
index d2b1eb4..25d2738 100644
--- a/phplib/Cookie.php
+++ b/phplib/Cookie.php
@@ -98,14 +98,13 @@ public static function generate($data, $date) {
      */
     public static function write() {
         $site = SiteFinder::getCurrent();
-        $domain = explode(':', $site['host'])[0];
         if(self::$write && self::$dirty && Auth::isCookie()) {
             $expiry = $_SERVER['REQUEST_TIME'] + self::COOKIE_LIFETIME;
             setcookie(
                 self::COOKIE_KEY,
                 self::generate(self::$cache, $_SERVER['REQUEST_TIME']),
                 $expiry,
-                '/', $domain,
+                '/', '',
                 false, true
             );
         }