diff --git a/composer.json b/composer.json
index c07a8b0ed..febcc749a 100644
--- a/composer.json
+++ b/composer.json
@@ -30,7 +30,7 @@
 		"chillerlan/php-settings-container": "^1.1"
 	},
 	"require-dev": {
-		"phpunit/phpunit": "^8.0"
+		"phpunit/phpunit": "^8.3"
 	},
 	"suggest": {
 		"chillerlan/php-authenticator": "^3.0"