diff --git a/support/openapi-template/Cargo.mustache b/support/openapi-template/Cargo.mustache
index 8c2510345..6417d15cd 100644
--- a/support/openapi-template/Cargo.mustache
+++ b/support/openapi-template/Cargo.mustache
@@ -38,6 +38,7 @@ serde_derive = "^1.0"
 serde_with = "^2.0"
 {{/serdeWith}}
 serde_json = "^1.0"
+serde_repr = "^0.1"
 url = "^2.2"
 uuid = { version = "^1.0", features = ["serde", "v4"] }
 {{#hyper}}
@@ -65,5 +66,6 @@ reqwest-middleware = "0.2.0"
 [dependencies.reqwest]
 version = "^0.11"
 features = ["json", "multipart"]
+default-features = false
 {{/supportAsync}}
 {{/reqwest}}
diff --git a/support/openapi-template/lib.mustache b/support/openapi-template/lib.mustache
index cdc5287aa..f1444c707 100644
--- a/support/openapi-template/lib.mustache
+++ b/support/openapi-template/lib.mustache
@@ -1,5 +1,10 @@
+#![allow(warnings)]
+#![allow(clippy::all)]
+
 #[macro_use]
 extern crate serde_derive;
+#[macro_use]
+extern crate serde_repr;
 
 extern crate serde;
 extern crate serde_json;
diff --git a/support/openapi-template/model.mustache b/support/openapi-template/model.mustache
index e193499d4..4a22118a8 100644
--- a/support/openapi-template/model.mustache
+++ b/support/openapi-template/model.mustache
@@ -5,8 +5,43 @@
 /// {{{classname}}} : {{{description}}}
 {{/description}}
 
+{{!-- for repr(int) enum schemas --}}
+{{#isEnum}}
+{{#isInteger}}
+/// {{{description}}}
+#[repr(i64)]
+#[derive(Clone, Copy, Debug, Eq, PartialEq, Ord, PartialOrd, Hash, Serialize_repr, Deserialize_repr)]
+pub enum {{{classname}}} {
+{{#allowableValues}}
+{{#enumVars}}
+    {{{name}}} = {{{value}}},
+{{/enumVars}}{{/allowableValues}}
+}
+
+impl ToString for {{{classname}}} {
+    fn to_string(&self) -> String {
+        match self {
+            {{#allowableValues}}
+            {{#enumVars}}
+            Self::{{{name}}} => String::from("{{{value}}}"),
+            {{/enumVars}}
+            {{/allowableValues}}
+        }
+    }
+}
+
+impl Default for {{{classname}}} {
+    fn default() -> {{{classname}}} {
+        {{#allowableValues}}
+        Self::{{ enumVars.0.name }}
+        {{/allowableValues}}
+    }
+}
+{{/isInteger}}
+{{/isEnum}}
 {{!-- for enum schemas --}}
 {{#isEnum}}
+{{^isInteger}}
 /// {{{description}}}
 #[derive(Clone, Copy, Debug, Eq, PartialEq, Ord, PartialOrd, Hash, Serialize, Deserialize)]
 pub enum {{{classname}}} {
@@ -36,6 +71,7 @@ impl Default for {{{classname}}} {
         {{/allowableValues}}
     }
 }
+{{/isInteger}}
 {{/isEnum}}
 
 {{!-- for schemas that have a discriminator --}}
@@ -70,8 +106,8 @@ pub struct {{{classname}}} {
     {{#description}}
     /// {{{.}}}
     {{/description}}
-    #[serde(rename = "{{{baseName}}}"{{^required}}{{#isNullable}}, default, with = "::serde_with::rust::double_option"{{/isNullable}}{{/required}}{{^required}}, skip_serializing_if = "Option::is_none"{{/required}}{{#required}}{{#isNullable}}, deserialize_with = "Option::deserialize"{{/isNullable}}{{/required}})]
-    pub {{{name}}}: {{#isNullable}}Option<{{/isNullable}}{{^required}}Option<{{/required}}{{#isEnum}}{{#isArray}}{{#uniqueItems}}std::collections::HashSet<{{/uniqueItems}}{{^uniqueItems}}Vec<{{/uniqueItems}}{{/isArray}}{{{enumName}}}{{#isArray}}>{{/isArray}}{{/isEnum}}{{^isEnum}}{{#isModel}}Box<{{{dataType}}}>{{/isModel}}{{^isModel}}{{{dataType}}}{{/isModel}}{{/isEnum}}{{#isNullable}}>{{/isNullable}}{{^required}}>{{/required}},
+    #[serde(rename = "{{{baseName}}}"{{^required}}, skip_serializing_if = "Option::is_none"{{/required}})]
+    pub {{{name}}}: {{#required}}{{#isNullable}}Option<{{/isNullable}}{{/required}}{{^required}}Option<{{/required}}{{#isEnum}}{{#isArray}}{{#uniqueItems}}std::collections::HashSet<{{/uniqueItems}}{{^uniqueItems}}Vec<{{/uniqueItems}}{{/isArray}}{{{enumName}}}{{#isArray}}>{{/isArray}}{{/isEnum}}{{^isEnum}}{{#isModel}}Box<{{{dataType}}}>{{/isModel}}{{^isModel}}{{{dataType}}}{{/isModel}}{{/isEnum}}{{#required}}{{#isNullable}}>{{/isNullable}}{{/required}}{{^required}}>{{/required}},
 {{/vars}}
 }
 
@@ -79,10 +115,10 @@ impl {{{classname}}} {
     {{#description}}
     /// {{{.}}}
     {{/description}}
-    pub fn new({{#requiredVars}}{{{name}}}: {{#isNullable}}Option<{{/isNullable}}{{#isEnum}}{{#isArray}}{{#uniqueItems}}std::collections::HashSet<{{/uniqueItems}}{{^uniqueItems}}Vec<{{/uniqueItems}}{{/isArray}}{{{enumName}}}{{#isArray}}>{{/isArray}}{{/isEnum}}{{^isEnum}}{{{dataType}}}{{/isEnum}}{{#isNullable}}>{{/isNullable}}{{^-last}}, {{/-last}}{{/requiredVars}}) -> {{{classname}}} {
+    pub fn new({{#requiredVars}}{{{name}}}: {{#isNullable}}Option<{{/isNullable}}{{#isEnum}}{{{enumName}}}{{/isEnum}}{{^isEnum}}{{{dataType}}}{{/isEnum}}{{#isNullable}}>{{/isNullable}}{{^-last}}, {{/-last}}{{/requiredVars}}) -> {{{classname}}} {
         {{{classname}}} {
             {{#vars}}
-            {{{name}}}{{^required}}{{#isContainer}}{{#isArray}}: None{{/isArray}}{{#isMap}}: None{{/isMap}}{{^isArray}}{{^isMap}}{{#isNullable}}: None{{/isNullable}}{{/isMap}}{{/isArray}}{{/isContainer}}{{^isContainer}}: None{{/isContainer}}{{/required}}{{#required}}{{#isModel}}: {{^isNullable}}Box::new({{{name}}}){{/isNullable}}{{#isNullable}}if let Some(x) = {{{name}}} {Some(Box::new(x))} else {None}{{/isNullable}}{{/isModel}}{{/required}},
+            {{{name}}}{{^required}}{{#isArray}}: None{{/isArray}}{{#isMap}}: None{{/isMap}}{{^isContainer}}: None{{/isContainer}}{{/required}}{{#required}}{{#isModel}}: Box::new({{{name}}}){{/isModel}}{{/required}},
             {{/vars}}
         }
     }
diff --git a/support/openapi-template/reqwest/api.mustache b/support/openapi-template/reqwest/api.mustache
index 3e130bbbc..8128244a2 100644
--- a/support/openapi-template/reqwest/api.mustache
+++ b/support/openapi-template/reqwest/api.mustache
@@ -17,7 +17,7 @@ pub struct {{{operationIdCamelCase}}}Params {
     {{#description}}
     /// {{{.}}}
     {{/description}}
-    pub {{{paramName}}}: {{^required}}Option<{{/required}}{{#required}}{{#isNullable}}Option<{{/isNullable}}{{/required}}{{^isUuid}}{{#isString}}{{#isArray}}Vec<{{/isArray}}String{{#isArray}}>{{/isArray}}{{/isString}}{{/isUuid}}{{#isUuid}}{{#isArray}}Vec<{{/isArray}}String{{#isArray}}>{{/isArray}}{{/isUuid}}{{^isString}}{{^isUuid}}{{^isPrimitiveType}}{{^isContainer}}{{#isBodyParam}}crate::models::{{/isBodyParam}}{{/isContainer}}{{/isPrimitiveType}}{{{dataType}}}{{/isUuid}}{{/isString}}{{^required}}>{{/required}}{{#required}}{{#isNullable}}>{{/isNullable}}{{/required}}{{^-last}},{{/-last}}
+    pub {{{paramName}}}: {{^required}}Option<{{/required}}{{#required}}{{#isNullable}}Option<{{/isNullable}}{{/required}}{{^isUuid}}{{#isString}}{{#isArray}}Vec<{{/isArray}}String{{#isArray}}>{{/isArray}}{{/isString}}{{/isUuid}}{{#isUuid}}{{#isArray}}Vec<{{/isArray}}uuid::Uuid{{#isArray}}>{{/isArray}}{{/isUuid}}{{^isString}}{{^isUuid}}{{^isPrimitiveType}}{{^isContainer}}{{#isBodyParam}}crate::models::{{/isBodyParam}}{{/isContainer}}{{/isPrimitiveType}}{{{dataType}}}{{/isUuid}}{{/isString}}{{^required}}>{{/required}}{{#required}}{{#isNullable}}>{{/isNullable}}{{/required}}{{^-last}},{{/-last}}
 {{#-last}}
 }
 
@@ -90,13 +90,13 @@ pub {{#supportAsync}}async {{/supportAsync}}fn {{{operationId}}}(configuration:
 
 {{/vendorExtensions.x-group-parameters}}
 {{^vendorExtensions.x-group-parameters}}
-pub {{#supportAsync}}async {{/supportAsync}}fn {{{operationId}}}(configuration: &configuration::Configuration, {{#allParams}}{{{paramName}}}: {{^required}}Option<{{/required}}{{#required}}{{#isNullable}}Option<{{/isNullable}}{{/required}}{{#isString}}{{#isArray}}Vec<{{/isArray}}{{^isUuid}}&str{{/isUuid}}{{#isArray}}>{{/isArray}}{{/isString}}{{#isUuid}}{{#isArray}}Vec<{{/isArray}}&str{{#isArray}}>{{/isArray}}{{/isUuid}}{{^isString}}{{^isUuid}}{{^isPrimitiveType}}{{^isContainer}}{{#isBodyParam}}crate::models::{{/isBodyParam}}{{/isContainer}}{{/isPrimitiveType}}{{{dataType}}}{{/isUuid}}{{/isString}}{{^required}}>{{/required}}{{#required}}{{#isNullable}}>{{/isNullable}}{{/required}}{{^-last}}, {{/-last}}{{/allParams}}) -> Result<{{#supportMultipleResponses}}ResponseContent<{{{operationIdCamelCase}}}Success>{{/supportMultipleResponses}}{{^supportMultipleResponses}}{{^returnType}}(){{/returnType}}{{{returnType}}}{{/supportMultipleResponses}}, Error<{{{operationIdCamelCase}}}Error>> {
+pub {{#supportAsync}}async {{/supportAsync}}fn {{{operationId}}}(configuration: &configuration::Configuration, {{#allParams}}{{{paramName}}}: {{^required}}Option<{{/required}}{{#required}}{{#isNullable}}Option<{{/isNullable}}{{/required}}{{#isString}}{{#isArray}}Vec<{{/isArray}}{{^isUuid}}&str{{/isUuid}}{{#isArray}}>{{/isArray}}{{/isString}}{{#isUuid}}{{#isArray}}Vec<{{/isArray}}uuid::Uuid{{#isArray}}>{{/isArray}}{{/isUuid}}{{^isString}}{{^isUuid}}{{^isPrimitiveType}}{{^isContainer}}crate::models::{{/isContainer}}{{/isPrimitiveType}}{{{dataType}}}{{/isUuid}}{{/isString}}{{^required}}>{{/required}}{{#required}}{{#isNullable}}>{{/isNullable}}{{/required}}{{^-last}}, {{/-last}}{{/allParams}}) -> Result<{{#supportMultipleResponses}}ResponseContent<{{{operationIdCamelCase}}}Success>{{/supportMultipleResponses}}{{^supportMultipleResponses}}{{^returnType}}(){{/returnType}}{{{returnType}}}{{/supportMultipleResponses}}, Error<{{{operationIdCamelCase}}}Error>> {
     let local_var_configuration = configuration;
 {{/vendorExtensions.x-group-parameters}}
 
     let local_var_client = &local_var_configuration.client;
 
-    let local_var_uri_str = format!("{}{{{path}}}", local_var_configuration.base_path{{#pathParams}}, {{{baseName}}}={{#isString}}crate::apis::urlencode({{/isString}}{{{paramName}}}{{^required}}.unwrap(){{/required}}{{#required}}{{#isNullable}}.unwrap(){{/isNullable}}{{/required}}{{#isArray}}.join(",").as_ref(){{/isArray}}{{#isString}}){{/isString}}{{/pathParams}});
+    let local_var_uri_str = format!("{}{{{path}}}", local_var_configuration.base_path{{#pathParams}}, {{{baseName}}}={{#isString}}crate::apis::urlencode({{/isString}}{{{paramName}}}{{^required}}.unwrap(){{/required}}{{#required}}{{#isNullable}}.unwrap(){{/isNullable}}.to_string(){{/required}}{{#isArray}}.join(",").as_ref(){{/isArray}}{{#isString}}){{/isString}}{{/pathParams}});
     let mut local_var_req_builder = local_var_client.request(reqwest::Method::{{{httpMethod}}}, local_var_uri_str.as_str());
 
     {{#queryParams}}