diff --git a/composer.json b/composer.json
index d36f01e..6db3df2 100644
--- a/composer.json
+++ b/composer.json
@@ -22,10 +22,10 @@
         "php": "^7.2",
         "league/csv": "~9.0",
         "mustangostang/spyc": "~0.6",
-        "illuminate/support": "^6.0"
+        "illuminate/support": "~5.0|~6.0|~7.0"
     },
     "require-dev": {
-        "phpunit/phpunit": "~8.0"
+        "phpunit/phpunit": "~8.0|~9.0"
     },
     "autoload": {
         "psr-4": {