diff --git a/composer.json b/composer.json
index 3c82b0d..1adcd5f 100644
--- a/composer.json
+++ b/composer.json
@@ -9,8 +9,7 @@
     "require-dev": {
         "phpunit/phpunit": "^5.0 || ^6.0 || ^7.0",
         "ext-xdebug": "*",
-        "php": "~5.6 || ~7.0",
-        "monolog/monolog": "^1.23"
+        "php": "~5.6 || ~7.0"
     },
     "autoload-dev": {
         "psr-4": {
diff --git a/src/prepend.php b/src/prepend.php
index ebd9540..34129f5 100644
--- a/src/prepend.php
+++ b/src/prepend.php
@@ -12,7 +12,26 @@
 call_user_func(function() {
     $x = new \Composer\XdebugHandler\XdebugHandler('RWX');
     if ($logFile = getenv('RWX_DEBUG_LOG')) {
-        $logger = new \Monolog\Logger('rwx', [new \Monolog\Handler\StreamHandler($logFile)]);
+        if (!class_exists(Logger::class, false)) {
+            class Logger extends \Psr\Log\AbstractLogger
+            {
+                private $filename;
+                public function __construct($filename)
+                {
+                    $this->filename = $filename;
+                }
+                public function log($level, $message, array $context = array())
+                {
+                    $formatted = '[' . $level . '] '
+                        . $message
+                        . " : "
+                        . strtr(var_export($context, true), ["\r" => '', "\n" => ''])
+                        . PHP_EOL;
+                    file_put_contents($this->filename, $formatted, FILE_APPEND);
+                }
+            }
+        }
+        $logger = new Logger($logFile);
     } else {
         $logger = new \Psr\Log\NullLogger;
     }