diff --git a/src/DependencyInjection/Configuration.php b/src/DependencyInjection/Configuration.php
index bf0b6b3..7ab7eb0 100644
--- a/src/DependencyInjection/Configuration.php
+++ b/src/DependencyInjection/Configuration.php
@@ -21,6 +21,7 @@ public function getConfigTreeBuilder()
             ->scalarNode('api_key')->end()
             ->booleanNode('debug')->end()
             ->arrayNode('masked')->scalarPrototype()->end()
+            ->arrayNode('ignore')->scalarPrototype()->end()
             ->end();
 
         return $treeBuilder;