diff --git a/src/multi-select-tree.js b/src/multi-select-tree.js
index b1f858f..424638d 100644
--- a/src/multi-select-tree.js
+++ b/src/multi-select-tree.js
@@ -235,7 +235,7 @@
               scope.refreshSelectedItems();
               scope.refreshOutputModel();
             }
-          });
+          }, true);
 
           /**
            * Checks whether any of children match the keyword.
@@ -283,4 +283,4 @@
         controller: 'multiSelectTreeCtrl'
       };
     });
-}());
\ No newline at end of file
+}());