diff --git a/src/pyelephant.py b/src/pyelephant.py
index 1a42510..2aca6e3 100755
--- a/src/pyelephant.py
+++ b/src/pyelephant.py
@@ -16,6 +16,14 @@ def add(session: sa.orm.Session, title: str):
     show_by_obj(obj)
 
 
+# -----------------------------------------------------------------------------
+def done(session: sa.orm.Session, index: int):
+    obj = session.query(Task).filter(Task.id == index).one()
+    assert(obj.active is True)
+    obj.active = False
+    session.commit()
+
+
 # -----------------------------------------------------------------------------
 def rm(session: sa.orm.Session, index: int):
     session.query(Task).filter(Task.id == index).delete()
@@ -53,6 +61,7 @@ if __name__ == '__main__':
 
         actions = {
             'add': add,
+            'done': done,
             'rm': rm,
             'show': show_by_id,
             'ls': ls
@@ -66,6 +75,10 @@ if __name__ == '__main__':
         add_parser.set_defaults(func=add)
         add_parser.add_argument("title", type=str)
 
+        done_parser = subparsers.add_parser('done')
+        done_parser.set_defaults(func=done)
+        done_parser.add_argument('index', type=int)
+
         rm_parser = subparsers.add_parser('rm')
         rm_parser.set_defaults(func=rm)
         rm_parser.add_argument("index", type=int)