diff --git a/app.py b/app.py
index 92424d0..f6bd652 100755
--- a/app.py
+++ b/app.py
@@ -89,6 +89,7 @@ def create_app():
         configs['output'] = 'results/out_official.tsv'
         configs['tree_size'] = '2-4'
         configs['node_type'] = 'upos'
+        configs['head_info'] = True
 
         # mandatory parameters with default value
         configs['internal_saves'] = './internal_saves'
@@ -395,6 +396,8 @@ def create_app():
             elif validate_node_type(node_type):
                 configs['node_type'] = '+'.join(node_type)
 
+            configs['head_info'] = True
+
             # mandatory parameters with default value
             configs['internal_saves'] = None