diff --git a/src/Authentication/MainCookie.php b/src/Authentication/MainCookie.php
index d80fbfe..62a7573 100644
--- a/src/Authentication/MainCookie.php
+++ b/src/Authentication/MainCookie.php
@@ -93,7 +93,7 @@ class MainCookie extends Authenticator {
     {
         $cookieFile = $this->file() ?: $this->newFileName();
 
-        return $this->cookie = new FileCookieJar($cookieFile);
+        return $this->cookie = new FileCookieJar($cookieFile, true);
     }
 
 }