diff --git a/lib/utils.js b/lib/utils.js
index ff56f08..8da7165 100644
--- a/lib/utils.js
+++ b/lib/utils.js
@@ -55,7 +55,7 @@ function issueJWT(user) {
 
   const payload = {
     sub: _id,
-    iat: Date.now()
+    iat: Math.floor(Date.now() / 1000)
   };
 
   const signedToken = jsonwebtoken.sign(payload, PRIV_KEY, { expiresIn: expiresIn, algorithm: 'RS256' });
@@ -68,4 +68,4 @@ function issueJWT(user) {
 
 module.exports.validPassword = validPassword;
 module.exports.genPassword = genPassword;
-module.exports.issueJWT = issueJWT;
\ No newline at end of file
+module.exports.issueJWT = issueJWT;