diff --git a/composer.json b/composer.json
index ebcb849d..c21f88ae 100644
--- a/composer.json
+++ b/composer.json
@@ -35,9 +35,8 @@
 		"theseer/phpdox": "^0.9.0",
 		"phploc/phploc": "^3.0",
 		"phpmd/phpmd": "^2.4",
-		"phpunit/phpunit": "^5.7",
+		"phpunit/phpunit": "^6.0",
 		"robmorgan/phinx": "^0.6.4",
-		"humbug/humbug": "~1.0@dev",
 		"consolidation/robo": "~1.0",
 		"henrikbjorn/lurker": "^1.1.0",
 		"symfony/var-dumper": "^3.1",