diff --git a/composer.json b/composer.json
index 5b81de5..6d7e718 100644
--- a/composer.json
+++ b/composer.json
@@ -17,9 +17,10 @@
 		"php": ">=5.4.4"
 	},
 	"require-dev": {
-		"nette/tester": "~1.0",
+		"nette/tester": "~2.0",
 		"tracy/tracy": "^2.3"
 	},
+	"minimum-stability": "dev",
 	"autoload": {
 		"classmap": ["src/"]
 	}