diff --git a/core/data_operations/round_data.py b/core/data_operations/round_data.py
index 8658f04c..c611ff45 100644
--- a/core/data_operations/round_data.py
+++ b/core/data_operations/round_data.py
@@ -101,7 +101,7 @@ def get_round_data(language):
                 "deadline": "2023-04-14 11:59:00"
                 if not Config.FORCE_OPEN
                 else "2024-12-31 11:59:00",
-                "assessment_deadline": "2023-05-05 12:00:00",
+                "assessment_deadline": "2023-05-17 12:00:00",
                 "instructions": (
                     "Mae'n rhaid i chi fod wedi derbyn gwahoddiad i ymgeisio."
                     " Os na wnaethom eich gwahodd,  <a href="