diff --git a/composer.json b/composer.json
index 1afc00c..c946577 100644
--- a/composer.json
+++ b/composer.json
@@ -13,7 +13,7 @@
 	"require": {
 		"php": "~7.2",
 		"phing/phing": "~2.16",
-		"phpunit/phpunit": "~6.0"
+		"phpunit/phpunit": "^7.0.1"
 	},
 	"require-dev": {
 		"consistence/coding-standard": "3.7",
diff --git a/tests/phpunit.xml b/tests/phpunit.xml
index 2ad6758..82b188b 100644
--- a/tests/phpunit.xml
+++ b/tests/phpunit.xml
@@ -15,7 +15,6 @@
 		<log
 			type="coverage-html"
 			target="../build/log/coverage/html"
-			charset="UTF-8"
 			lowUpperBound="100"
 			highLowerBound="100"
 		/>