diff --git a/composer.json b/composer.json
index dea640b..57ae74e 100644
--- a/composer.json
+++ b/composer.json
@@ -20,6 +20,7 @@
     },
     "require-dev": {
         "phpunit/phpunit": "^4.5 || ^5.0",
+        "nyholm/nsa": "^1.0",
         "php-http/guzzle5-adapter": "^1.0",
         "guzzlehttp/psr7": "^1.2",
         "mockery/mockery": "^0.9",
diff --git a/src/AccessToken.php b/src/AccessToken.php
index 926d443..db82d7b 100644
--- a/src/AccessToken.php
+++ b/src/AccessToken.php
@@ -34,6 +34,31 @@ public function __construct($token = null, $expiresIn = null)
         }
     }
 
+    /**
+     * Restore a stored access token.
+     *
+     * @param string|AccessToken $token
+     *
+     * @return AccessToken
+     */
+    public static function create($token)
+    {
+        if (empty($token)) {
+            return new self();
+        }
+
+        if ($token instanceof AccessToken) {
+            return $token;
+        }
+
+        $unserialized = @unserialize($token);
+        if ($unserialized instanceof AccessToken) {
+            return $unserialized;
+        }
+
+        return new self($token);
+    }
+
     /**
      * @return string
      */
diff --git a/src/Authenticator.php b/src/Authenticator.php
index a98f5fd..1b217e2 100644
--- a/src/Authenticator.php
+++ b/src/Authenticator.php
@@ -81,7 +81,7 @@ public function fetchNewAccessToken(LinkedInUrlGeneratorInterface $urlGenerator)
         }
 
         $storage->set('code', $code);
-        $storage->set('access_token', $accessToken);
+        $storage->set('access_token', serialize($accessToken));
 
         return $accessToken;
     }
diff --git a/src/LinkedIn.php b/src/LinkedIn.php
index bef60cf..a277b21 100644
--- a/src/LinkedIn.php
+++ b/src/LinkedIn.php
@@ -304,11 +304,7 @@ public function getAccessToken()
      */
     public function setAccessToken($accessToken)
     {
-        if (!($accessToken instanceof AccessToken)) {
-            $accessToken = new AccessToken($accessToken);
-        }
-
-        $this->accessToken = $accessToken;
+        $this->accessToken = AccessToken::create($accessToken);
 
         return $this;
     }
diff --git a/tests/AccessTokenTest.php b/tests/AccessTokenTest.php
index 9762c5c..4c87641 100644
--- a/tests/AccessTokenTest.php
+++ b/tests/AccessTokenTest.php
@@ -36,4 +36,35 @@ public function testSetExpiresAt()
         $token->setExpiresAt(new \DateTime('+2minutes'));
         $this->assertInstanceOf('\DateTime', $token->getExpiresAt());
     }
+
+    public function testCreateWithString()
+    {
+        $token = AccessToken::create('foobar');
+        $this->assertInstanceOf(AccessToken::class, $token);
+        $this->assertEquals('foobar', $token->__toString());
+    }
+
+    public function testCreateWithNoData()
+    {
+        $token = AccessToken::create('');
+        $this->assertInstanceOf(AccessToken::class, $token);
+        $this->assertEquals('', $token->__toString());
+    }
+
+    public function testCreateWithAccessToken()
+    {
+        $orgToken = new AccessToken('foobar', 10);
+        $token = AccessToken::create($orgToken);
+        $this->assertInstanceOf(AccessToken::class, $token);
+        $this->assertEquals('foobar', $token->__toString());
+    }
+
+    public function testCreateWithSerializedAccessToken()
+    {
+        $orgToken = new AccessToken('foobar', 10);
+        $orgTokenSerialized = serialize($orgToken);
+        $token = AccessToken::create($orgTokenSerialized);
+        $this->assertInstanceOf(AccessToken::class, $token);
+        $this->assertEquals('foobar', $token->__toString());
+    }
 }
diff --git a/tests/LinkedInTest.php b/tests/LinkedInTest.php
index 7f93b4d..d6ad964 100644
--- a/tests/LinkedInTest.php
+++ b/tests/LinkedInTest.php
@@ -3,6 +3,7 @@
 namespace Happyr\LinkedIn;
 
 use GuzzleHttp\Psr7\Response;
+use Nyholm\NSA;
 
 /**
  * @author Tobias Nyholm <tobias.nyholm@gmail.com>
@@ -77,10 +78,16 @@ public function testAccessTokenAccessors()
     {
         $token = 'token';
 
-        $auth = $this->getMock('Happyr\LinkedIn\Authenticator', ['fetchNewAccessToken'], [], '', false);
+        $auth = $this->getMockBuilder('Happyr\LinkedIn\Authenticator')
+            ->setMethods(['fetchNewAccessToken'])
+            ->disableOriginalConstructor()
+            ->getMock();
         $auth->expects($this->once())->method('fetchNewAccessToken')->will($this->returnValue($token));
 
-        $linkedIn = $this->getMock('Happyr\LinkedIn\LinkedIn', ['getAuthenticator'], [], '', false);
+        $linkedIn = $this->getMockBuilder('Happyr\LinkedIn\LinkedIn')
+            ->setMethods(['getAuthenticator'])
+            ->disableOriginalConstructor()
+            ->getMock();
         $linkedIn->expects($this->once())->method('getAuthenticator')->willReturn($auth);
 
         // Make sure we go to the authenticator only once
@@ -88,6 +95,27 @@ public function testAccessTokenAccessors()
         $this->assertEquals($token, $linkedIn->getAccessToken());
     }
 
+    public function testAccessTokenSetterWithSerializedToken()
+    {
+        $linkedIn = new LinkedIn(self::APP_ID, self::APP_SECRET);
+        $token = new AccessToken('foobar');
+        $serializedToken = serialize($token);
+        $linkedIn->setAccessToken($serializedToken);
+
+        $storedToken = NSA::getProperty($linkedIn, 'accessToken');
+        $this->assertEquals('foobar', $storedToken->__toString());
+    }
+
+    public function testAccessTokenSetterWithTokenObject()
+    {
+        $linkedIn = new LinkedIn(self::APP_ID, self::APP_SECRET);
+        $token = new AccessToken('foobar');
+        $linkedIn->setAccessToken($token);
+
+        $storedToken = NSA::getProperty($linkedIn, 'accessToken');
+        $this->assertEquals('foobar', $storedToken->__toString());
+    }
+
     public function testGeneratorAccessors()
     {
         $get = new \ReflectionMethod('Happyr\LinkedIn\LinkedIn', 'getUrlGenerator');