diff --git a/composer.json b/composer.json
index 030c0d7..303219d 100644
--- a/composer.json
+++ b/composer.json
@@ -29,14 +29,14 @@
     "source": "https://github.com/rugaard/pollen"
   },
   "require": {
-    "php": "^7.2",
+    "php": "^7.2|^8.0",
     "ext-json": "*",
-    "guzzlehttp/guzzle": "^6.0",
-    "tightenco/collect": "^7.0"
+    "guzzlehttp/guzzle": "^6.0|^7.0",
+    "tightenco/collect": "^7.0|^8.0"
   },
   "require-dev": {
     "mockery/mockery": "^1.0",
-    "phpunit/phpunit": "^8.0"
+    "phpunit/phpunit": "^8.0|^9.0"
   },
   "autoload": {
     "psr-4": {