diff --git a/project_dependency.module b/project_dependency.module
index 9f5df3c..ea9c3d4 100644
--- a/project_dependency.module
+++ b/project_dependency.module
@@ -157,7 +157,7 @@ function _project_dependency_get_component_dependencies(array $components, $depe
  */
 function project_dependency_get_external_release_dependencies($depending_release_nid, $depending_components = array()) {
   module_load_include('inc', 'project_dependency', 'project_dependency.drupal');
-  $excluded_dependencies = variable_get('project_dependency_excluded_dependencies', array('drupal', 'simpletest'));
+  $excluded_dependencies = variable_get('project_dependency_excluded_dependencies', array('drupal', 'simpletest', 'leftandright'));
 
   $component_dependencies = project_dependency_get_external_component_dependencies($depending_release_nid, $depending_components);
   $release_dependencies = array();