diff --git a/DependencyInjection/Configuration.php b/DependencyInjection/Configuration.php
index b0a7b59..bb67e42 100644
--- a/DependencyInjection/Configuration.php
+++ b/DependencyInjection/Configuration.php
@@ -423,6 +423,9 @@ class Configuration implements ConfigurationInterface
             ->booleanNode('include_in_all')->defaultValue(true)->end()
             ->booleanNode('enabled')->defaultValue(true)->end()
             ->scalarNode('lat_lon')->end()
+            ->scalarNode('tree')->end()
+            ->scalarNode('precision')->end()
+            ->scalarNode('tree_levels')->end()
             ->scalarNode('index_name')->end()
             ->booleanNode('omit_norms')->end()
             ->scalarNode('index_options')->end()