diff --git a/ChangeLog b/ChangeLog
index 0622f059a4..1f4cd9ac29 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -52,6 +52,7 @@ phpMyAdmin - ChangeLog
 - issue #13821 Lock page when changes are done in the SQL editor
 - issue #13842 Prefer iconv for encoding conversions
 - issue #13737 Fixed changing password on MariaDB cluster
+- issue #13846 Compatibility with phpseclib 2.0.8
 
 4.7.5 (2017-10-23)
 - issue #13615 Avoid problems with browsing unknown query types
diff --git a/composer.json b/composer.json
index 363f6658c5..fcc525a838 100644
--- a/composer.json
+++ b/composer.json
@@ -48,7 +48,7 @@
         "phpmyadmin/sql-parser": "^4.2.3",
         "phpmyadmin/motranslator": "^3.0",
         "phpmyadmin/shapefile": "^2.0",
-        "phpseclib/phpseclib": "^2.0",
+        "phpseclib/phpseclib": "^2.0.8",
         "google/recaptcha": "^1.1",
         "psr/container": "^1.0",
         "twig/twig": "^1.32",
diff --git a/libraries/classes/Plugins/Auth/AuthenticationCookie.php b/libraries/classes/Plugins/Auth/AuthenticationCookie.php
index 7ce1ad7339..2d7a7c7c7b 100644
--- a/libraries/classes/Plugins/Auth/AuthenticationCookie.php
+++ b/libraries/classes/Plugins/Auth/AuthenticationCookie.php
@@ -720,7 +720,7 @@ class AuthenticationCookie extends AuthenticationPlugin
                 $iv
             );
         } else {
-            $cipher = new Crypt\AES(Crypt\Base::MODE_CBC);
+            $cipher = new Crypt\AES('cbc');
             $cipher->setIV($iv);
             $cipher->setKey($aes_secret);
             $result = base64_encode($cipher->encrypt($data));
@@ -772,7 +772,7 @@ class AuthenticationCookie extends AuthenticationPlugin
                 base64_decode($data['iv'])
             );
         } else {
-            $cipher = new Crypt\AES(Crypt\Base::MODE_CBC);
+            $cipher = new Crypt\AES('cbc');
             $cipher->setIV(base64_decode($data['iv']));
             $cipher->setKey($aes_secret);
             $result = $cipher->decrypt(base64_decode($data['payload']));
@@ -791,8 +791,8 @@ class AuthenticationCookie extends AuthenticationPlugin
         if ($this->_use_openssl) {
             return openssl_cipher_iv_length('AES-128-CBC');
         }
-        $cipher = new Crypt\AES(Crypt\Base::MODE_CBC);
-        return $cipher->block_size;
+        $cipher = new Crypt\AES('cbc');
+        return $cipher->getBlockLengthInBytes();
     }
 
     /**