diff --git a/.travis.yml b/.travis.yml
index eb1735b..59409eb 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,5 +1,6 @@
 language: php
 php:
+- 7.0
 - 5.6
 - 5.5
 - 5.4
diff --git a/composer.json b/composer.json
index d5e6dfb..10e36f3 100644
--- a/composer.json
+++ b/composer.json
@@ -39,7 +39,7 @@
         "php": ">=5.4",
         "guzzle/guzzle": "3.9.*",
         "firebase/php-jwt": "2.2.*",
-        "phpseclib/phpseclib": "0.3.*"
+        "phpseclib/phpseclib": "2.0.*"
     },
     "require-dev": {
         "phpunit/phpunit": "4.*"
diff --git a/src/Authc/Api/ApiKeyEncryptionUtils.php b/src/Authc/Api/ApiKeyEncryptionUtils.php
index 88019f8..c768d21 100644
--- a/src/Authc/Api/ApiKeyEncryptionUtils.php
+++ b/src/Authc/Api/ApiKeyEncryptionUtils.php
@@ -18,6 +18,8 @@
  * limitations under the License.
  */
 
+use phpseclib\Crypt\AES;
+
 class ApiKeyEncryptionUtils
 {
     public static function decrypt($secret, $password, ApiKeyEncryptionOptions $options)
@@ -28,7 +30,8 @@ public static function decrypt($secret, $password, ApiKeyEncryptionOptions $opti
         $keyLengthBits = $options->getEncryptionKeySize();
         $iv = substr($decodedSecret, 0, 16);
 
-        $aes = new \Crypt_AES();
+
+        $aes = new AES();
         $aes->setPassword($password, 'pbkdf2', 'sha1', $salt, $iterations, $keyLengthBits / 8);
         $aes->setKeyLength($keyLengthBits);
         $aes->setIV($iv);