diff --git a/classes/Config.php b/classes/Config.php
index 208e85b..674717b 100644
--- a/classes/Config.php
+++ b/classes/Config.php
@@ -100,7 +100,7 @@ class Config
             }
         }
         if (getenv('CONVERT')) {
-            $this->convert = getenv('CONVERT');
+            $this->convert = (bool) getenv('CONVERT');
         }
     }