diff --git a/grocy.openapi.json b/grocy.openapi.json
index f400b753..2a409b2f 100644
--- a/grocy.openapi.json
+++ b/grocy.openapi.json
@@ -5282,7 +5282,7 @@
 					},
 					"purchased_date": {
 						"type": "string",
-						"format": "date-time"
+						"format": "date"
 					},
 					"used_date": {
 						"type": "string",