diff --git a/composer.json b/composer.json
index 0f013d8..7f2cf5f 100644
--- a/composer.json
+++ b/composer.json
@@ -18,10 +18,10 @@
     "require": {
         "ext-curl": "*",
         "php": ">=7.2",
-        "psr/log": "^1.0"
+        "psr/log": "^1.0 | ^2.0"
     },
     "require-dev": {
-        "phpunit/phpunit": "8.3.*",
+        "phpunit/phpunit": "8.3.* | ^9",
         "squizlabs/php_codesniffer": "3.4.*",
         "php-coveralls/php-coveralls": "^2.4"
     },