diff --git a/lib/cookie.js b/lib/cookie.js
index 37d70ded..1136313d 100644
--- a/lib/cookie.js
+++ b/lib/cookie.js
@@ -29,7 +29,7 @@
  * POSSIBILITY OF SUCH DAMAGE.
  */
 "use strict";
-const punycode = require("punycode");
+const punycode = require("punycode/");
 const urlParse = require("url-parse");
 const pubsuffix = require("./pubsuffix-psl");
 const Store = require("./store").Store;