diff --git a/cloudflare.loader.php b/cloudflare.loader.php
index c5305212..95d5b099 100644
--- a/cloudflare.loader.php
+++ b/cloudflare.loader.php
@@ -1,6 +1,8 @@
 <?php
 
-require_once __DIR__.'/vendor/autoload.php';
+if (!class_exists('CloudFlare\IpRewrite')) {
+	require_once __DIR__.'/vendor/autoload.php';
+}
 
 use CloudFlare\IpRewrite;
 
diff --git a/composer.json b/composer.json
index 14807df1..ecb482d1 100644
--- a/composer.json
+++ b/composer.json
@@ -11,7 +11,7 @@
   "require": {
     "cloudflare/cf-ip-rewrite": "^1.0.0",
     "symfony/polyfill-intl-idn": "*",
-    "psr/log": "^1.0"
+    "psr/log": "^1.0 || ^3.0"
   },
   "require-dev": {
     "symfony/yaml": "~2.6",
@@ -40,5 +40,8 @@
     "allow-plugins": {
       "dealerdirect/phpcodesniffer-composer-installer": true
     }
+  },
+  "extra": {
+    "installer-name": "cloudflare"
   }
 }
diff --git a/composer.lock b/composer.lock
index ee41ae54..f2eaa43e 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "e8665bcdae6db5846ed6b42aef3e563e",
+    "content-hash": "38f0352fff5fc31da5152c8912eb191e",
     "packages": [
         {
             "name": "cloudflare/cf-ip-rewrite",
diff --git a/src/Integration/DefaultLogger.php b/src/Integration/DefaultLogger.php
index 65671e63..720e8475 100644
--- a/src/Integration/DefaultLogger.php
+++ b/src/Integration/DefaultLogger.php
@@ -6,6 +6,9 @@
 use Psr\Log\LogLevel;
 use Psr\Log\LoggerInterface;
 
+# if (Psr\Log version < 2)
+if (class_exists('Psr\Log\Test\DummyTest')):
+
 class DefaultLogger extends AbstractLogger implements LoggerInterface
 {
     private $debug;
@@ -46,3 +49,48 @@ public function debug($message, array $context = array())
         }
     }
 }
+
+else:
+
+class DefaultLogger extends AbstractLogger implements LoggerInterface
+{
+    private $debug;
+
+    const PREFIX = '[Cloudflare]';
+
+    /**
+     * @param bool|false $debug
+     */
+    public function __construct($debug = false)
+    {
+        $this->debug = $debug;
+    }
+
+    /**
+     * Logs with an arbitrary level.
+     *
+     * @param mixed  $level
+     * @param Stringable|string $message
+     * @param array  $context
+     */
+    public function log($level, Stringable|string $message, array $context = []): void
+    {
+        error_log(self::PREFIX.' '.strtoupper($level).': '.$message.' '.
+            (!empty($context) ? print_r($context, true) : ''));
+    }
+
+    /**
+     * Detailed debug information.
+     *
+     * @param Stringable|string $message
+     * @param array  $context
+     */
+    public function debug(Stringable|string $message, array $context = []): void
+    {
+        if ($this->debug) {
+            $this->log(LogLevel::DEBUG, $message, $context);
+        }
+    }
+}
+
+endif;