diff --git a/lib/index.js b/lib/index.js
index 575875b..fce7444 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -243,13 +243,18 @@ function getSecret (request, secret, token, callback) {
       return callback({ code: 'invalid_token', message: 'jwt signature is required' });
     }
 
-    let decodedToken = jwt.decode(token);
+    let decodedToken = jwt.decode(token, { complete: true });
 
     if (!decodedToken) {
       return callback({ code: 'invalid_token', message: 'jwt malformed' });
     }
 
-    secret(request, decodedToken, callback);
+    const arity = secret.length;
+    if (arity == 4) {
+      secret(request, decodedToken.header, decodedToken.payload, callback);
+    } else { // arity == 3
+      secret(request, decodedToken.payload, callback);
+    }
   } else {
     callback(null, secret);
   }