diff --git a/openapi.yaml b/openapi.yaml
index 94a8131..de97a6c 100644
--- a/openapi.yaml
+++ b/openapi.yaml
@@ -7387,8 +7387,10 @@ components:
           type: integer
         created_at:
           type: string
+          format: date-time
         updated_at:
           type: string
+          format: date-time
         n_epochs:
           type: integer
         n_checkpoints: