diff --git a/composer.json b/composer.json
index deaa8d888363b903f7ec29dc322182857a4d1104..d25780f41aa629f5bc07511c4f77578a7ea983d6 100644
--- a/composer.json
+++ b/composer.json
@@ -17,8 +17,8 @@
   },
   "require-dev": {
     "maglnet/composer-require-checker": ">=2.0",
-    "mikey179/vfsstream": "^1.6",
-    "phpunit/phpunit": ">=7.5"
+    "mikey179/vfsstream": "^1.6.8",
+    "phpunit/phpunit": ">=7.5 <10"
   },
   "autoload": {
     "psr-4": {