diff --git a/homeassistant/components/todoist/services.yaml b/homeassistant/components/todoist/services.yaml
index c2d23cc4bec..3382e27693d 100644
--- a/homeassistant/components/todoist/services.yaml
+++ b/homeassistant/components/todoist/services.yaml
@@ -21,5 +21,5 @@ new_task:
       example: en
     due_date:
       description: The day this task is due, in format YYYY-MM-DD.
-      example: 2019-10-22
+      example: "2019-10-22"