diff --git a/composer.json b/composer.json
index dfbbb9e..5a7d110 100644
--- a/composer.json
+++ b/composer.json
@@ -1,30 +1,31 @@
-{
-    "name": "inwx/domrobot",
-    "description": "PHP Client to easily use the Domrobot API of INWX",
-    "license": "MIT",
-    "homepage": "https://www.inwx.com/en/",
-    "support": {
-        "docs": "https://www.inwx.com/en/help/apidoc",
-        "email": "support@inwx.de",
-        "source": "https://github.com/inwx/php-client"
-    },
-    "authors": [
-        {
-            "name": "INWX",
-            "email": "support@inwx.de"
-        }
-    ],
-    "require": {
-        "php": ">=7.2",
-        "ext-curl": "*"
-    },
-    "autoload": {
-        "psr-4": {
-            "INWX\\": "src/"
-        }
-    },
-    "suggest": {
-        "ext-xmlrpc": "Needed to use the XML-RPC API",
-        "ext-json": "Needed to use the JSON-RPC API"
-    }
-}
+{
+    "name": "inwx/domrobot",
+    "description": "PHP Client to easily use the Domrobot API of INWX",
+    "license": "MIT",
+    "homepage": "https://www.inwx.com/en/",
+    "support": {
+        "docs": "https://www.inwx.com/en/help/apidoc",
+        "email": "support@inwx.de",
+        "source": "https://github.com/inwx/php-client"
+    },
+    "authors": [
+        {
+            "name": "INWX",
+            "email": "support@inwx.de"
+        }
+    ],
+    "require": {
+        "php": ">=7.2",
+        "ext-curl": "*",
+        "monolog/monolog": ">= 2.0.0"
+    },
+    "autoload": {
+        "psr-4": {
+            "INWX\\": "src/"
+        }
+    },
+    "suggest": {
+        "ext-xmlrpc": "Needed to use the XML-RPC API",
+        "ext-json": "Needed to use the JSON-RPC API"
+    }
+}
diff --git a/src/Domrobot.php b/src/Domrobot.php
index 7868e9b..8cd0376 100644
--- a/src/Domrobot.php
+++ b/src/Domrobot.php
@@ -2,9 +2,13 @@
 
 namespace INWX;
 
+use Monolog\Handler\StreamHandler;
+use Monolog\Logger;
+use Psr\Log\LoggerAwareInterface;
+use Psr\Log\LoggerInterface;
 use RuntimeException;
 
-class Domrobot
+class Domrobot implements LoggerAwareInterface
 {
     private const VERSION = '3.0';
     private const LIVE_URL = 'https://api.domrobot.com/';
@@ -21,6 +25,11 @@ class Domrobot
     private $url = self::OTE_URL;
     private $api = self::JSONRPC;
 
+    /**
+     * @var LoggerInterface
+     */
+    private $logger;
+
     /**
      * Domrobot constructor.
      *
@@ -28,6 +37,8 @@ class Domrobot
      */
     public function __construct(?string $cookieFile = null)
     {
+        $this->logger = new Logger('domrobot_default_logger');
+        $this->logger->pushHandler(new StreamHandler('php://stdout', Logger::DEBUG));
         $this->cookieFile = $cookieFile ?? tempnam(sys_get_temp_dir(), 'INWX');
     }
 
@@ -286,8 +297,8 @@ public function call(string $object, string $method, array $params = []): array
         $response = curl_exec($ch);
         curl_close($ch);
         if ($this->debug) {
-            echo "Request:\n" . $request . "\n";
-            echo "Response:\n" . $response . "\n";
+            $this->logger->debug("Request:\n" . $request . "\n");
+            $this->logger->debug("Response:\n" . $response . "\n");
         }
 
         if ($this->isJson()) {
@@ -354,4 +365,12 @@ public function logout(): array
 
         return $ret;
     }
+
+    /**
+     * @inheritDoc
+     */
+    public function setLogger(LoggerInterface $logger)
+    {
+        $this->logger = $logger;
+    }
 }