diff --git a/pom.xml b/pom.xml
index a63eb41b537..9e42bba2ad2 100644
--- a/pom.xml
+++ b/pom.xml
@@ -1368,7 +1368,7 @@
         <maven.compiler.source>1.8</maven.compiler.source>
         <maven.compiler.target>1.8</maven.compiler.target>
         <swagger-parser-groupid>org.openapitools.swagger.parser</swagger-parser-groupid>
-        <swagger-parser-version>2.0.13-OpenAPITools.org-1</swagger-parser-version>
+        <swagger-parser-version>2.0.13-OpenAPITools.org-2</swagger-parser-version>
         <swagger-core-version>2.0.7</swagger-core-version>
         <scala-version>2.11.1</scala-version>
         <felix-version>3.3.1</felix-version>
diff --git a/samples/server/petstore/rust-server/output/rust-server-test/api/openapi.yaml b/samples/server/petstore/rust-server/output/rust-server-test/api/openapi.yaml
index b2b215809d0..f74c8f90cc8 100644
--- a/samples/server/petstore/rust-server/output/rust-server-test/api/openapi.yaml
+++ b/samples/server/petstore/rust-server/output/rust-server-test/api/openapi.yaml
@@ -127,10 +127,10 @@ components:
       type: object
     ObjectOfObjects_inner:
       properties:
-        optional_thing:
-          type: integer
         required_thing:
           type: string
+        optional_thing:
+          type: integer
       required:
       - required_thing
 
diff --git a/samples/server/petstore/rust-server/output/rust-server-test/docs/ObjectOfObjectsInner.md b/samples/server/petstore/rust-server/output/rust-server-test/docs/ObjectOfObjectsInner.md
index 81a62e6fd97..9aa888a5f7c 100644
--- a/samples/server/petstore/rust-server/output/rust-server-test/docs/ObjectOfObjectsInner.md
+++ b/samples/server/petstore/rust-server/output/rust-server-test/docs/ObjectOfObjectsInner.md
@@ -3,8 +3,8 @@
 ## Properties
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
-**optional_thing** | **isize** |  | [optional] [default to None]
 **required_thing** | **String** |  | 
+**optional_thing** | **isize** |  | [optional] [default to None]
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 
diff --git a/samples/server/petstore/rust-server/output/rust-server-test/src/models.rs b/samples/server/petstore/rust-server/output/rust-server-test/src/models.rs
index 257ce5d2694..ee9a16a375f 100644
--- a/samples/server/petstore/rust-server/output/rust-server-test/src/models.rs
+++ b/samples/server/petstore/rust-server/output/rust-server-test/src/models.rs
@@ -88,20 +88,20 @@ impl ObjectOfObjects {
 
 #[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
 pub struct ObjectOfObjectsInner {
+    #[serde(rename = "required_thing")]
+    pub required_thing: String,
+
     #[serde(rename = "optional_thing")]
     #[serde(skip_serializing_if="Option::is_none")]
     pub optional_thing: Option<isize>,
 
-    #[serde(rename = "required_thing")]
-    pub required_thing: String,
-
 }
 
 impl ObjectOfObjectsInner {
     pub fn new(required_thing: String, ) -> ObjectOfObjectsInner {
         ObjectOfObjectsInner {
-            optional_thing: None,
             required_thing: required_thing,
+            optional_thing: None,
         }
     }
 }