diff --git a/api/routes/authenticate.js b/api/routes/authenticate.js
index a0d233f..398cd03 100644
--- a/api/routes/authenticate.js
+++ b/api/routes/authenticate.js
@@ -29,11 +29,11 @@ authenticate.route('/')
           res.send(user);
         } else {
           // authentication failed
-          res.status(401).send('Username or password is incorrect');
+          res.status(codes.unauthorized).send('Username or password is incorrect');
         }
       })
       .catch((err) => {
-        res.status(400).send(err);
+        res.status(codes.wrongrequest).send(err);
       });
   })
 
@@ -47,7 +47,7 @@ let authCheck = (username, password) => {
   AppUserModel.findOne({username: username}, (err, user) => {
     if (err) deferred.reject(err.name + ': ' + err.message);
 
-    const diff = 60 * 24; // time till expiration [minutes]
+    const diff = 3 * 60 * 24; // time till expiration [minutes]
 
     if (user && bcrypt.compareSync(password, user.password)) {
       // authentication successful
diff --git a/api/routes/http-codes.js b/api/routes/http-codes.js
index dbfac5b..8e12bee 100644
--- a/api/routes/http-codes.js
+++ b/api/routes/http-codes.js
@@ -10,6 +10,7 @@ module.exports = {
   created: 201,
   nocontent: 204,
   wrongrequest: 400,
+  unauthorized: 401,
   forbidden: 403,
   notfound: 404,
   wrongmethod: 405,