diff --git a/composer.json b/composer.json
index 234d5ba..463c9b6 100755
--- a/composer.json
+++ b/composer.json
@@ -21,7 +21,7 @@
         "league/oauth2-client": "^2.0"
     },
     "require-dev": {
-        "phpunit/phpunit": "~4.0"
+        "phpunit/phpunit": "~10.3"
     },
     "autoload": {
         "psr-4": {