diff --git a/src/main/java/org/openapitools/api/StoreApiDelegateImpl.java b/src/main/java/org/openapitools/api/StoreApiDelegateImpl.java
index 029a16c..6117ca1 100644
--- a/src/main/java/org/openapitools/api/StoreApiDelegateImpl.java
+++ b/src/main/java/org/openapitools/api/StoreApiDelegateImpl.java
@@ -46,8 +46,8 @@ void initOrders() {
 
 
     @Override
-    public ResponseEntity<Void> deleteOrder(String orderId) {
-        Order order = orderRepository.findById(Long.valueOf(orderId))
+    public ResponseEntity<Void> deleteOrder(Long orderId) {
+        Order order = orderRepository.findById(orderId)
                 .orElseThrow(() -> new ResponseStatusException(HttpStatus.NOT_FOUND));
         orderRepository.delete(order);
         return ResponseEntity.ok().build();
diff --git a/src/main/resources/openapi.yaml b/src/main/resources/openapi.yaml
index f9d7b26..6ca5897 100644
--- a/src/main/resources/openapi.yaml
+++ b/src/main/resources/openapi.yaml
@@ -382,7 +382,8 @@ paths:
         style: simple
         explode: false
         schema:
-          type: string
+          type: integer
+          format: int64
       responses:
         400:
           description: Invalid ID supplied
@@ -598,6 +599,8 @@ components:
     Order:
       title: Pet Order
       type: object
+      required:
+        - id
       properties:
         id:
           type: integer
@@ -649,6 +652,9 @@ components:
     User:
       title: a User
       type: object
+      required:
+        - id
+        - username
       properties:
         id:
           type: integer