diff --git a/attract/node_types/task.py b/attract/node_types/task.py
index 80da3ba..4ab4392 100644
--- a/attract/node_types/task.py
+++ b/attract/node_types/task.py
@@ -33,6 +33,10 @@ node_type_task = {
             }
         },
 
+        'due_date': {
+            'type': 'datetime',
+        },
+
         # For Gantt charts and the like.
         'time': {
             'type': 'dict',