diff --git a/composer.json b/composer.json
index d88ad30..14b00ba 100644
--- a/composer.json
+++ b/composer.json
@@ -9,7 +9,7 @@
     "ext-json": "*",
     "aeon-php/calendar": "^1.0",
     "aeon-php/sleep": ">=0.6.0",
-    "psr/cache": "^1.0",
+    "psr/cache": "^1.0|^2.0|^3.0",
     "symfony/polyfill-mbstring": "^1.0"
   },
   "require-dev": {
diff --git a/tools/composer.json b/tools/composer.json
index 25f1f5a..e5c8c96 100644
--- a/tools/composer.json
+++ b/tools/composer.json
@@ -7,5 +7,10 @@
         "phpstan/phpstan": "^1.0.0",
         "infection/infection": "^0.26.1",
         "friendsofphp/php-cs-fixer": "^3.1"
+    },
+    "config": {
+        "allow-plugins": {
+            "infection/extension-installer": true
+        }
     }
 }