diff --git a/api/v1/swagger/definitions/checkout.yaml b/api/v1/swagger/definitions/checkout.yaml
index 0879ddc515..3829255ffa 100644
--- a/api/v1/swagger/definitions/checkout.yaml
+++ b/api/v1/swagger/definitions/checkout.yaml
@@ -89,7 +89,7 @@ properties:
     type:
       - string
       - "null"
-    format: date
+    format: date-time
     description: Datetime of the issue note
   note_seen:
     type: