diff --git a/Factories/RollbarHandlerFactory.php b/Factories/RollbarHandlerFactory.php
index c030bd1..e6d719f 100755
--- a/Factories/RollbarHandlerFactory.php
+++ b/Factories/RollbarHandlerFactory.php
@@ -53,7 +53,7 @@ public function __construct(ContainerInterface $container)
             };
         }
 
-        $this->minimumLevel = $config['minimum_level'] ?: LogLevel::ERROR;
+        $this->minimumLevel = isset($config['minimum_level']) ? $config['minimum_level'] : LogLevel::ERROR;
 
         Rollbar::init($config, false, false, false);
     }