diff --git a/composer.json b/composer.json
index 56a00df..d565d74 100644
--- a/composer.json
+++ b/composer.json
@@ -20,7 +20,7 @@
     "require-dev": {
         "friendsofphp/php-cs-fixer": "^2.16",
         "overtrue/phplint": "^1.1",
-        "php-di/php-di": "^6",
+        "php-di/php-di": "^7",
         "phpstan/phpstan": "0.*",
         "phpunit/phpunit": "^6|^7",
         "squizlabs/php_codesniffer": "^3.4"