diff --git a/src/generators/MethodGenerator.test.ts b/src/generators/MethodGenerator.test.ts
index df3346ee..5ed8c99e 100644
--- a/src/generators/MethodGenerator.test.ts
+++ b/src/generators/MethodGenerator.test.ts
@@ -123,7 +123,7 @@ describe('MethodGenerator', () => {
       expect(methodDefinition.normalizedUrl).toBe('/identity-providers');
       expect(methodDefinition.parameterMethod).toBe('postById');
       expect(methodDefinition.pathParameters[0]).toEqual({name: 'id', type: 'any'});
-      expect(methodDefinition.bodyParameters[0]).toEqual({name: 'body', required: false, type: '{ user: string }'});
+      expect(methodDefinition.bodyParameters[0]).toEqual({name: 'body', required: false, type: '{ user?: string }'});
     });
   });
 });
diff --git a/src/generators/MethodGenerator.ts b/src/generators/MethodGenerator.ts
index e660420e..fd908f08 100644
--- a/src/generators/MethodGenerator.ts
+++ b/src/generators/MethodGenerator.ts
@@ -5,6 +5,7 @@ import * as StringUtil from '../util/StringUtil';
 
 export enum SwaggerType {
   ARRAY = 'array',
+  BOOLEAN = 'boolean',
   INTEGER = 'integer',
   NUMBER = 'number',
   OBJECT = 'object',
@@ -14,6 +15,7 @@ export enum SwaggerType {
 export enum TypeScriptType {
   ANY = 'any',
   ARRAY = 'Array',
+  BOOLEAN = 'boolean',
   EMPTY_OBJECT = '{}',
   NUMBER = 'number',
   STRING = 'string',
@@ -240,9 +242,11 @@ export class MethodGenerator {
 
         const schema: Record<string, string> = {};
 
-        for (const property of Object.keys(properties)) {
-          const propertyName = requiredProperties && !requiredProperties.includes(property) ? `${property}?` : property;
-          schema[propertyName] = this.buildTypeFromSchema(properties[property], `${schemaName}/${property}`);
+        for (const [property, propertyOptons] of Object.entries(properties)) {
+          const isRequired = requiredProperties && requiredProperties.includes(property);
+          const isReadOnly = propertyOptons.readOnly;
+          const propertyName = `${isReadOnly ? 'readonly ' : ''}${property}${isRequired ? '' : '?'}`;
+          schema[propertyName] = this.buildTypeFromSchema(propertyOptons, `${schemaName}/${property}`);
         }
 
         return inspect(schema, {breakLength: Infinity, depth: Infinity})
@@ -277,6 +281,9 @@ export class MethodGenerator {
       case SwaggerType.STRING: {
         return TypeScriptType.STRING;
       }
+      case SwaggerType.BOOLEAN: {
+        return TypeScriptType.BOOLEAN;
+      }
       case SwaggerType.NUMBER:
       case SwaggerType.INTEGER: {
         return TypeScriptType.NUMBER;
diff --git a/src/test/snapshots/1-query-param-description.ts.fixture b/src/test/snapshots/1-query-param-description.ts.fixture
index 55cbd1d8..05068ba5 100644
--- a/src/test/snapshots/1-query-param-description.ts.fixture
+++ b/src/test/snapshots/1-query-param-description.ts.fixture
@@ -19,8 +19,8 @@ export class ArchiveService {
    */
   archiveConversation = async (
     instanceId: string,
-    body: {archive: {}; conversationId: string}
-  ): Promise<{instanceId: string; name: string}> => {
+    body: {archive?: boolean; conversationId?: string}
+  ): Promise<{instanceId?: string; name?: string}> => {
     const config: AxiosRequestConfig = {
       data: {
         ...body,
@@ -29,8 +29,8 @@ export class ArchiveService {
       url: `/instance/${instanceId}/archive`,
     };
     const response = await this.apiClient.request<{
-      instanceId: string;
-      name: string;
+      instanceId?: string;
+      name?: string;
     }>(config);
     return response.data;
   };