diff --git a/webtoken.js b/webtoken.js
index d13bbb0..cc496ae 100644
--- a/webtoken.js
+++ b/webtoken.js
@@ -30,6 +30,9 @@ module.exports = {
     if (!key) {
       console.warn('*** tokenkey is empty! ***')
     }
+    if (!token) {
+      return null
+    }
     try {
       return JsonWebToken.verify(
         token,