diff --git a/composer.json b/composer.json
index 5676909..aedcce7 100644
--- a/composer.json
+++ b/composer.json
@@ -25,8 +25,8 @@
 		"consistence/coding-standard": "^0.12.0",
 		"slevomat/coding-standard": "^1.1",
 		"phing/phing": "^2.15",
-		"phpunit/phpunit": "^5.6",
-		"phpstan/phpstan": "^0.5.1",
+		"phpunit/phpunit": "^6.0.6",
+		"phpstan/phpstan": "^0.6.3",
 		"guzzlehttp/guzzle": "^6.2",
 		"composer/ca-bundle": "^1.0"
 	},
diff --git a/tests/SlevomatEET/Cryptography/CryptographyServiceTest.php b/tests/SlevomatEET/Cryptography/CryptographyServiceTest.php
index cc3e696..25b8284 100644
--- a/tests/SlevomatEET/Cryptography/CryptographyServiceTest.php
+++ b/tests/SlevomatEET/Cryptography/CryptographyServiceTest.php
@@ -90,7 +90,7 @@ public function testWSESignatureWithInvalidPrivateKeyPassword()
 			'invalid'
 		);
 
-		$this->expectException(\PHPUnit_Framework_Error::class);
+		$this->expectException(\PHPUnit\Framework\Error\Error::class);
 		$this->expectExceptionMessage('openssl_sign(): supplied key param cannot be coerced into a private key');
 		$crypto->addWSESignature($request);
 	}