diff --git a/.gitignore b/.gitignore
index ab18cb3..9fda7ee 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,5 @@
 composer.lock
+.phpunit.cache
 .phpunit.result.cache
 .php-cs-fixer.cache
 vendor
diff --git a/.phpunit.cache/test-results b/.phpunit.cache/test-results
deleted file mode 100644
index 281fa81..0000000
--- a/.phpunit.cache/test-results
+++ /dev/null
@@ -1 +0,0 @@
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\ No newline at end of file
diff --git a/composer.json b/composer.json
index 52a978b..3f572a6 100644
--- a/composer.json
+++ b/composer.json
@@ -21,7 +21,7 @@
     "require-dev": {
         "friendsofphp/php-cs-fixer": "^3",
         "guzzlehttp/guzzle": "^7.2",
-        "phpunit/phpunit": "10",
+        "phpunit/phpunit": "^9.5 || ^10.0",
         "sweetrdf/sparql-client": "^0.1"
     },
     "autoload": {