diff --git a/lib/cookies.js b/lib/cookies.js
index c74f45c..5c5e5f1 100644
--- a/lib/cookies.js
+++ b/lib/cookies.js
@@ -1,4 +1,4 @@
-const TWO_DAYS_IN_SECONDS = 172800 // 60 * 60 * 24 * 2
+const TWO_DAYS_IN_MILLISECONDS = 172800000 // 1000 * 60 * 60 * 24 * 2
 module.exports.updateCookie = (response, cookieName, value) => {
-  response.cookie(cookieName, value, { maxAge: TWO_DAYS_IN_SECONDS, httpOnly: true })
+  response.cookie(cookieName, value, { maxAge: TWO_DAYS_IN_MILLISECONDS, httpOnly: true })
 }