diff --git a/__tests__/fixtures/controllers.ts b/__tests__/fixtures/controllers.ts
index f6a7452..81a7594 100644
--- a/__tests__/fixtures/controllers.ts
+++ b/__tests__/fixtures/controllers.ts
@@ -34,11 +34,13 @@ export class CreateNestedBody {
   users: CreateUserBody[]
 }
 
-export class CreatePostBody {
+class CreatePostBodyBase {
   @IsString({ each: true })
   content: string[]
 }
 
+export class CreatePostBody extends CreatePostBodyBase {}
+
 export class ListUsersQueryParams {
   @IsOptional()
   @IsEmail()
@@ -130,7 +132,7 @@ export class UsersController {
 
   @Post('/:userId/posts')
   createUserPost(
-    @Body({ required: true }) _body: CreatePostBody,
+    @Body({ required: true, type: CreatePostBody }) _body: CreatePostBody,
     @BodyParam('token') _token: string
   ) {
     return
diff --git a/__tests__/index.test.ts b/__tests__/index.test.ts
index e03b01c..5b97d58 100644
--- a/__tests__/index.test.ts
+++ b/__tests__/index.test.ts
@@ -1,28 +1,25 @@
 // tslint:disable:no-implicit-dependencies no-submodule-imports
-const { defaultMetadataStorage } = require('class-transformer/cjs/storage')
-import { validationMetadatasToSchemas } from 'class-validator-jsonschema'
+import * as fs from 'fs'
+import { targetConstructorToSchema, validationMetadatasToSchemas } from 'class-validator-jsonschema'
 import _merge from 'lodash.merge'
 import { getMetadataArgsStorage } from 'routing-controllers'
 
-import {
-  expressToOpenAPIPath,
-  getFullPath,
-  getOperationId,
-  parseRoutes,
-  routingControllersToSpec,
-} from '../src'
+import { expressToOpenAPIPath, getFullPath, getOperationId, parseRoutes, routingControllersToSpec } from '../src'
 import { getRequestBody } from '../src/generateSpec'
 import {
+  CreatePostBody,
   RootController,
   UserPostsController,
-  UsersController,
+  UsersController
 } from './fixtures/controllers'
 
+const { defaultMetadataStorage } = require('class-transformer/cjs/storage')
+
 // Construct OpenAPI spec:
 const storage = getMetadataArgsStorage()
 const options = {
   controllers: [UsersController, UserPostsController],
-  routePrefix: '/api',
+  routePrefix: '/api'
 }
 const routes = parseRoutes(storage, options)
 
@@ -31,7 +28,12 @@ describe('index', () => {
     // Include component schemas parsed with class-validator-jsonschema:
     const schemas = validationMetadatasToSchemas({
       classTransformerMetadataStorage: defaultMetadataStorage,
-      refPointerPrefix: '#/components/schemas/',
+      refPointerPrefix: '#/components/schemas/'
+    })
+
+    schemas.CreatePostBody = targetConstructorToSchema(CreatePostBody, {
+      classTransformerMetadataStorage: defaultMetadataStorage,
+      refPointerPrefix: '#/components/schemas/'
     })
 
     const spec = routingControllersToSpec(storage, options, {
@@ -40,16 +42,17 @@ describe('index', () => {
         securitySchemes: {
           basicAuth: {
             scheme: 'basic',
-            type: 'http',
+            type: 'http'
           },
           bearerAuth: {
             scheme: 'bearer',
-            type: 'http',
-          },
-        },
+            type: 'http'
+          }
+        }
       },
-      info: { title: 'My app', version: '1.2.0' },
+      info: { title: 'My app', version: '1.2.0' }
     })
+    fs.writeFileSync('spec.test.json', JSON.stringify(spec, null, 2))
     expect(spec).toEqual(require('./fixtures/spec.json'))
   })
 
@@ -60,86 +63,86 @@ describe('index', () => {
         method: 'listUsers',
         route: '/',
         target: UsersController,
-        type: 'get',
+        type: 'get'
       },
       {
         method: 'listUsersInRange',
         route: '/:from-:to',
         target: UsersController,
-        type: 'get',
+        type: 'get'
       },
       {
         method: 'getUser',
         route: '/:userId?',
         target: UsersController,
-        type: 'get',
+        type: 'get'
       },
       {
         method: 'createUser',
         route: '/',
         target: UsersController,
-        type: 'post',
+        type: 'post'
       },
       {
         method: 'createUserWithType',
         route: '/withType',
         target: UsersController,
-        type: 'post',
+        type: 'post'
       },
       {
         method: 'createManyUsers',
         route: '/',
         target: UsersController,
-        type: 'put',
+        type: 'put'
       },
       {
         method: 'createNestedUsers',
         route: '/nested',
         target: UsersController,
-        type: 'post',
+        type: 'post'
       },
       {
         method: 'createUserPost',
         route: '/:userId/posts',
         target: UsersController,
-        type: 'post',
+        type: 'post'
       },
       {
         method: 'deleteUsersByVersion',
         route: '/:version(v?\\d{1}|all)',
         target: UsersController,
-        type: 'delete',
+        type: 'delete'
       },
       {
         method: 'putUserDefault',
         route: undefined,
         target: UsersController,
-        type: 'put',
+        type: 'put'
       },
       {
         method: 'getUserPost',
         route: '/:postId',
         target: UserPostsController,
-        type: 'get',
+        type: 'get'
       },
       {
         method: 'patchUserPost',
         route: '/:postId',
         target: UserPostsController,
-        type: 'patch',
+        type: 'patch'
       },
       {
         method: 'getDefaultPath',
         route: undefined,
         target: RootController,
-        type: 'get',
+        type: 'get'
       },
       {
         method: 'getStringPath',
         route: '/stringPath',
         target: RootController,
-        type: 'get',
-      },
+        type: 'get'
+      }
     ])
   })
 
@@ -181,7 +184,8 @@ describe('index', () => {
     const route = _merge({}, routes[0])
     expect(getOperationId(route)).toEqual('UsersController.listUsers')
 
-    route.action.target = class AnotherController {}
+    route.action.target = class AnotherController {
+    }
     route.action.method = 'anotherMethod'
     expect(getOperationId(route)).toEqual('AnotherController.anotherMethod')
   })
@@ -189,112 +193,132 @@ describe('index', () => {
 
 describe('getRequestBody', () => {
   it('parse a single `body` metadata item into a single `object` schema', () => {
+    const schemas = validationMetadatasToSchemas({
+      classTransformerMetadataStorage: defaultMetadataStorage,
+      refPointerPrefix: '#/components/schemas/'
+    })
     const route = routes.find((d) => d.action.method === 'createUser')!
     expect(route).toBeDefined()
-    expect(getRequestBody(route)).toEqual({
+    expect(getRequestBody(route, schemas)).toEqual({
       content: {
         'application/json': {
           schema: {
-            $ref: '#/components/schemas/CreateUserBody',
-          },
-        },
+            $ref: '#/components/schemas/CreateUserBody'
+          }
+        }
       },
       description: 'CreateUserBody',
-      required: false,
+      required: false
     })
   })
 
   it('parse a single `body` metadata item of array type into a single `object` schema', () => {
     const route = routes.find((d) => d.action.method === 'createManyUsers')!
+    const schemas = validationMetadatasToSchemas({
+      classTransformerMetadataStorage: defaultMetadataStorage,
+      refPointerPrefix: '#/components/schemas/'
+    })
     expect(route).toBeDefined()
-    expect(getRequestBody(route)).toEqual({
+    expect(getRequestBody(route, schemas)).toEqual({
       content: {
         'application/json': {
           schema: {
             items: {
-              $ref: '#/components/schemas/CreateUserBody',
+              $ref: '#/components/schemas/CreateUserBody'
             },
-            type: 'array',
-          },
-        },
+            type: 'array'
+          }
+        }
       },
       description: 'CreateUserBody',
-      required: true,
+      required: true
     })
   })
 
   it('parse a single `body-param` metadata item into a single `object` schema', () => {
+    const schemas = validationMetadatasToSchemas({
+      classTransformerMetadataStorage: defaultMetadataStorage,
+      refPointerPrefix: '#/components/schemas/'
+    })
     const route = routes.find((d) => d.action.method === 'patchUserPost')!
     expect(route).toBeDefined()
-    expect(getRequestBody(route)).toEqual({
+    expect(getRequestBody(route, schemas)).toEqual({
       content: {
         'application/json': {
           schema: {
             properties: {
               token: {
-                type: 'string',
-              },
+                type: 'string'
+              }
             },
             required: [],
-            type: 'object',
-          },
-        },
-      },
+            type: 'object'
+          }
+        }
+      }
     })
   })
 
   it('combine multiple `body-param` metadata items into a single `object` schema', () => {
+    const schemas = validationMetadatasToSchemas({
+      classTransformerMetadataStorage: defaultMetadataStorage,
+      refPointerPrefix: '#/components/schemas/'
+    })
     const route = routes.find((d) => d.action.method === 'putUserDefault')!
     expect(route).toBeDefined()
-    expect(getRequestBody(route)).toEqual({
+    expect(getRequestBody(route, schemas)).toEqual({
       content: {
         'application/json': {
           schema: {
             properties: {
               limit: {
-                type: 'number',
+                type: 'number'
               },
               query: {
-                $ref: '#/components/schemas/UserQuery',
+                $ref: '#/components/schemas/UserQuery'
               },
               token: {
-                type: 'string',
-              },
+                type: 'string'
+              }
             },
             required: ['token'],
-            type: 'object',
-          },
-        },
-      },
+            type: 'object'
+          }
+        }
+      }
     })
   })
 
   it('wrap `body` and `body-param` metadata items under a single `allOf` schema', () => {
+    const schemas = validationMetadatasToSchemas({
+      classTransformerMetadataStorage: defaultMetadataStorage,
+      refPointerPrefix: '#/components/schemas/'
+    })
     const route = routes.find((d) => d.action.method === 'createUserPost')!
     expect(route).toBeDefined()
-    expect(getRequestBody(route)).toEqual({
+    expect(getRequestBody(route, schemas)).toEqual({
       content: {
         'application/json': {
           schema: {
             allOf: [
               {
-                $ref: '#/components/schemas/CreatePostBody',
+                $ref: '#/components/schemas/CreatePostBody'
               },
               {
                 properties: {
                   token: {
-                    type: 'string',
-                  },
+                    type: 'string'
+                  }
                 },
                 required: [],
-                type: 'object',
-              },
-            ],
-          },
-        },
+                type: 'object'
+              }
+            ]
+          }
+        }
       },
       description: 'CreatePostBody',
-      required: true,
+      required: true
     })
   })
 })
diff --git a/package-lock.json b/package-lock.json
index 4df533c..b93ab88 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -28,8 +28,8 @@
         "@types/rimraf": "^3.0.0",
         "@types/validator": "^13.7.10",
         "class-transformer": "^0.5.1",
-        "class-validator": "^0.13.2",
-        "class-validator-jsonschema": "^3.1.1",
+        "class-validator": "^0.14.1",
+        "class-validator-jsonschema": "^5.0.1",
         "codecov": "^3.8.1",
         "jest": "^29.3.1",
         "prettier": "^2.8.0",
@@ -1254,10 +1254,9 @@
       "dev": true
     },
     "node_modules/@types/validator": {
-      "version": "13.7.10",
-      "resolved": "https://registry.npmjs.org/@types/validator/-/validator-13.7.10.tgz",
-      "integrity": "sha512-t1yxFAR2n0+VO6hd/FJ9F2uezAZVWHLmpmlJzm1eX03+H7+HsuTAp7L8QJs+2pQCfWkP1+EXsGK9Z9v7o/qPVQ==",
-      "dev": true
+      "version": "13.11.10",
+      "resolved": "https://registry.npmjs.org/@types/validator/-/validator-13.11.10.tgz",
+      "integrity": "sha512-e2PNXoXLr6Z+dbfx5zSh9TRlXJrELycxiaXznp4S5+D2M3b9bqJEitNHA5923jhnB2zzFiZHa2f0SI1HoIahpg=="
     },
     "node_modules/@types/yargs": {
       "version": "17.0.17",
@@ -1740,29 +1739,51 @@
       "integrity": "sha512-SQa1Ws6hUbfC98vKGxZH3KFY0Y1lm5Zm0SY8XX9zbK7FJCyVEac3ATW0RIpwzW+oOfmHE5PMPufDG9hCfoEOMw=="
     },
     "node_modules/class-validator": {
-      "version": "0.13.2",
-      "resolved": "https://registry.npmjs.org/class-validator/-/class-validator-0.13.2.tgz",
-      "integrity": "sha512-yBUcQy07FPlGzUjoLuUfIOXzgynnQPPruyK1Ge2B74k9ROwnle1E+NxLWnUv5OLU8hA/qL5leAE9XnXq3byaBw==",
+      "version": "0.14.1",
+      "resolved": "https://registry.npmjs.org/class-validator/-/class-validator-0.14.1.tgz",
+      "integrity": "sha512-2VEG9JICxIqTpoK1eMzZqaV+u/EiwEJkMGzTrZf6sU/fwsnOITVgYJ8yojSy6CaXtO9V0Cc6ZQZ8h8m4UBuLwQ==",
       "dependencies": {
-        "libphonenumber-js": "^1.9.43",
-        "validator": "^13.7.0"
+        "@types/validator": "^13.11.8",
+        "libphonenumber-js": "^1.10.53",
+        "validator": "^13.9.0"
       }
     },
     "node_modules/class-validator-jsonschema": {
-      "version": "3.1.1",
-      "resolved": "https://registry.npmjs.org/class-validator-jsonschema/-/class-validator-jsonschema-3.1.1.tgz",
-      "integrity": "sha512-xga/5rTDKaYysivdX6OWaVllAS2OGeXgRRaXRo5QAW+mSDOpbjrf5JhmdPvUKMEkGyQer0gCoferB3COl170Rg==",
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/class-validator-jsonschema/-/class-validator-jsonschema-5.0.1.tgz",
+      "integrity": "sha512-9uTdo5jSnJUj7f0dS8YZDqM0Fv1Uky0BWefswnNa2F4nRcKPCiEb5z3nDUaXyEzcERCrizE+0AGDSao1uSNX9g==",
       "dev": true,
       "dependencies": {
         "lodash.groupby": "^4.6.0",
         "lodash.merge": "^4.6.2",
-        "openapi3-ts": "^2.0.0",
+        "openapi3-ts": "^3.0.0",
         "reflect-metadata": "^0.1.13",
-        "tslib": "^2.0.3"
+        "tslib": "^2.4.1"
       },
       "peerDependencies": {
         "class-transformer": "^0.4.0 || ^0.5.0",
-        "class-validator": "^0.13.1"
+        "class-validator": "^0.14.0"
+      }
+    },
+    "node_modules/class-validator-jsonschema/node_modules/openapi3-ts": {
+      "version": "3.2.0",
+      "resolved": "https://registry.npmjs.org/openapi3-ts/-/openapi3-ts-3.2.0.tgz",
+      "integrity": "sha512-/ykNWRV5Qs0Nwq7Pc0nJ78fgILvOT/60OxEmB3v7yQ8a8Bwcm43D4diaYazG/KBn6czA+52XYy931WFLMCUeSg==",
+      "dev": true,
+      "dependencies": {
+        "yaml": "^2.2.1"
+      }
+    },
+    "node_modules/class-validator-jsonschema/node_modules/yaml": {
+      "version": "2.4.3",
+      "resolved": "https://registry.npmjs.org/yaml/-/yaml-2.4.3.tgz",
+      "integrity": "sha512-sntgmxj8o7DE7g/Qi60cqpLBA3HG3STcDA0kO+WfB05jEKhZMbY7umNm2rBpQvsmZ16/lPXCJGW2672dgOUkrg==",
+      "dev": true,
+      "bin": {
+        "yaml": "bin.mjs"
+      },
+      "engines": {
+        "node": ">= 14"
       }
     },
     "node_modules/cliui": {
@@ -3855,9 +3876,9 @@
       }
     },
     "node_modules/libphonenumber-js": {
-      "version": "1.10.15",
-      "resolved": "https://registry.npmjs.org/libphonenumber-js/-/libphonenumber-js-1.10.15.tgz",
-      "integrity": "sha512-sLeVLmWX17VCKKulc+aDIRHS95TxoTsKMRJi5s5gJdwlqNzMWcBCtSHHruVyXjqfi67daXM2SnLf2juSrdx5Sg=="
+      "version": "1.11.3",
+      "resolved": "https://registry.npmjs.org/libphonenumber-js/-/libphonenumber-js-1.11.3.tgz",
+      "integrity": "sha512-RU0CTsLCu2v6VEzdP+W6UU2n5+jEpMDRkGxUeBgsAJgre3vKgm17eApISH9OQY4G0jZYJVIc8qXmz6CJFueAFg=="
     },
     "node_modules/lines-and-columns": {
       "version": "1.2.4",
@@ -5651,9 +5672,9 @@
       }
     },
     "node_modules/validator": {
-      "version": "13.7.0",
-      "resolved": "https://registry.npmjs.org/validator/-/validator-13.7.0.tgz",
-      "integrity": "sha512-nYXQLCBkpJ8X6ltALua9dRrZDHVYxjJ1wgskNt1lH9fzGjs3tgojGSCBjmEPwkWS1y29+DrizMTW19Pr9uB2nw==",
+      "version": "13.12.0",
+      "resolved": "https://registry.npmjs.org/validator/-/validator-13.12.0.tgz",
+      "integrity": "sha512-c1Q0mCiPlgdTVVVIJIrBuxNicYE+t/7oKeI9MWLj3fh/uq2Pxh/3eeWbVZ4OcGW1TUf53At0njHw5SMdA3tmMg==",
       "engines": {
         "node": ">= 0.10"
       }
@@ -6781,10 +6802,9 @@
       "dev": true
     },
     "@types/validator": {
-      "version": "13.7.10",
-      "resolved": "https://registry.npmjs.org/@types/validator/-/validator-13.7.10.tgz",
-      "integrity": "sha512-t1yxFAR2n0+VO6hd/FJ9F2uezAZVWHLmpmlJzm1eX03+H7+HsuTAp7L8QJs+2pQCfWkP1+EXsGK9Z9v7o/qPVQ==",
-      "dev": true
+      "version": "13.11.10",
+      "resolved": "https://registry.npmjs.org/@types/validator/-/validator-13.11.10.tgz",
+      "integrity": "sha512-e2PNXoXLr6Z+dbfx5zSh9TRlXJrELycxiaXznp4S5+D2M3b9bqJEitNHA5923jhnB2zzFiZHa2f0SI1HoIahpg=="
     },
     "@types/yargs": {
       "version": "17.0.17",
@@ -7152,25 +7172,43 @@
       "integrity": "sha512-SQa1Ws6hUbfC98vKGxZH3KFY0Y1lm5Zm0SY8XX9zbK7FJCyVEac3ATW0RIpwzW+oOfmHE5PMPufDG9hCfoEOMw=="
     },
     "class-validator": {
-      "version": "0.13.2",
-      "resolved": "https://registry.npmjs.org/class-validator/-/class-validator-0.13.2.tgz",
-      "integrity": "sha512-yBUcQy07FPlGzUjoLuUfIOXzgynnQPPruyK1Ge2B74k9ROwnle1E+NxLWnUv5OLU8hA/qL5leAE9XnXq3byaBw==",
+      "version": "0.14.1",
+      "resolved": "https://registry.npmjs.org/class-validator/-/class-validator-0.14.1.tgz",
+      "integrity": "sha512-2VEG9JICxIqTpoK1eMzZqaV+u/EiwEJkMGzTrZf6sU/fwsnOITVgYJ8yojSy6CaXtO9V0Cc6ZQZ8h8m4UBuLwQ==",
       "requires": {
-        "libphonenumber-js": "^1.9.43",
-        "validator": "^13.7.0"
+        "@types/validator": "^13.11.8",
+        "libphonenumber-js": "^1.10.53",
+        "validator": "^13.9.0"
       }
     },
     "class-validator-jsonschema": {
-      "version": "3.1.1",
-      "resolved": "https://registry.npmjs.org/class-validator-jsonschema/-/class-validator-jsonschema-3.1.1.tgz",
-      "integrity": "sha512-xga/5rTDKaYysivdX6OWaVllAS2OGeXgRRaXRo5QAW+mSDOpbjrf5JhmdPvUKMEkGyQer0gCoferB3COl170Rg==",
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/class-validator-jsonschema/-/class-validator-jsonschema-5.0.1.tgz",
+      "integrity": "sha512-9uTdo5jSnJUj7f0dS8YZDqM0Fv1Uky0BWefswnNa2F4nRcKPCiEb5z3nDUaXyEzcERCrizE+0AGDSao1uSNX9g==",
       "dev": true,
       "requires": {
         "lodash.groupby": "^4.6.0",
         "lodash.merge": "^4.6.2",
-        "openapi3-ts": "^2.0.0",
+        "openapi3-ts": "^3.0.0",
         "reflect-metadata": "^0.1.13",
-        "tslib": "^2.0.3"
+        "tslib": "^2.4.1"
+      },
+      "dependencies": {
+        "openapi3-ts": {
+          "version": "3.2.0",
+          "resolved": "https://registry.npmjs.org/openapi3-ts/-/openapi3-ts-3.2.0.tgz",
+          "integrity": "sha512-/ykNWRV5Qs0Nwq7Pc0nJ78fgILvOT/60OxEmB3v7yQ8a8Bwcm43D4diaYazG/KBn6czA+52XYy931WFLMCUeSg==",
+          "dev": true,
+          "requires": {
+            "yaml": "^2.2.1"
+          }
+        },
+        "yaml": {
+          "version": "2.4.3",
+          "resolved": "https://registry.npmjs.org/yaml/-/yaml-2.4.3.tgz",
+          "integrity": "sha512-sntgmxj8o7DE7g/Qi60cqpLBA3HG3STcDA0kO+WfB05jEKhZMbY7umNm2rBpQvsmZ16/lPXCJGW2672dgOUkrg==",
+          "dev": true
+        }
       }
     },
     "cliui": {
@@ -8788,9 +8826,9 @@
       "dev": true
     },
     "libphonenumber-js": {
-      "version": "1.10.15",
-      "resolved": "https://registry.npmjs.org/libphonenumber-js/-/libphonenumber-js-1.10.15.tgz",
-      "integrity": "sha512-sLeVLmWX17VCKKulc+aDIRHS95TxoTsKMRJi5s5gJdwlqNzMWcBCtSHHruVyXjqfi67daXM2SnLf2juSrdx5Sg=="
+      "version": "1.11.3",
+      "resolved": "https://registry.npmjs.org/libphonenumber-js/-/libphonenumber-js-1.11.3.tgz",
+      "integrity": "sha512-RU0CTsLCu2v6VEzdP+W6UU2n5+jEpMDRkGxUeBgsAJgre3vKgm17eApISH9OQY4G0jZYJVIc8qXmz6CJFueAFg=="
     },
     "lines-and-columns": {
       "version": "1.2.4",
@@ -10165,9 +10203,9 @@
       }
     },
     "validator": {
-      "version": "13.7.0",
-      "resolved": "https://registry.npmjs.org/validator/-/validator-13.7.0.tgz",
-      "integrity": "sha512-nYXQLCBkpJ8X6ltALua9dRrZDHVYxjJ1wgskNt1lH9fzGjs3tgojGSCBjmEPwkWS1y29+DrizMTW19Pr9uB2nw=="
+      "version": "13.12.0",
+      "resolved": "https://registry.npmjs.org/validator/-/validator-13.12.0.tgz",
+      "integrity": "sha512-c1Q0mCiPlgdTVVVIJIrBuxNicYE+t/7oKeI9MWLj3fh/uq2Pxh/3eeWbVZ4OcGW1TUf53At0njHw5SMdA3tmMg=="
     },
     "vary": {
       "version": "1.1.2",
diff --git a/package.json b/package.json
index 2558ade..9a484f3 100644
--- a/package.json
+++ b/package.json
@@ -29,6 +29,9 @@
     "singleQuote": true
   },
   "dependencies": {
+    "class-transformer": "^0.5.1",
+    "class-validator": "^0.14.1",
+    "class-validator-jsonschema": "^5.0.1",
     "lodash.capitalize": "^4.2.1",
     "lodash.merge": "^4.6.2",
     "lodash.startcase": "^4.4.0",
@@ -47,9 +50,6 @@
     "@types/reflect-metadata": "^0.1.0",
     "@types/rimraf": "^3.0.0",
     "@types/validator": "^13.7.10",
-    "class-transformer": "^0.5.1",
-    "class-validator": "^0.13.2",
-    "class-validator-jsonschema": "^3.1.1",
     "codecov": "^3.8.1",
     "jest": "^29.3.1",
     "prettier": "^2.8.0",
diff --git a/src/generateSpec.ts b/src/generateSpec.ts
index 3ef1463..3f338c3 100644
--- a/src/generateSpec.ts
+++ b/src/generateSpec.ts
@@ -9,6 +9,9 @@ import { ParamMetadataArgs } from 'routing-controllers/types/metadata/args/Param
 
 import { applyOpenAPIDecorator } from './decorators'
 import { IRoute } from './index'
+import { targetConstructorToSchema } from 'class-validator-jsonschema'
+
+const { defaultMetadataStorage } = require('class-transformer/cjs/storage')
 
 /** Return full Express path of given route. */
 export function getFullExpressPath(route: IRoute): string {
@@ -37,11 +40,11 @@ export function getOperation(
   const operation: oa.OperationObject = {
     operationId: getOperationId(route),
     parameters: [
-      ...getHeaderParams(route),
-      ...getPathParams(route),
+      ...getHeaderParams(route, schemas),
+      ...getPathParams(route, schemas),
       ...getQueryParams(route, schemas),
     ],
-    requestBody: getRequestBody(route) || undefined,
+    requestBody: getRequestBody(route, schemas) || undefined,
     responses: getResponses(route),
     summary: getSummary(route),
     tags: getTags(route),
@@ -86,11 +89,14 @@ export function getPaths(
 /**
  * Return header parameters of given route.
  */
-export function getHeaderParams(route: IRoute): oa.ParameterObject[] {
+export function getHeaderParams(
+  route: IRoute,
+  schemas: { [p: string]: oa.SchemaObject }
+): oa.ParameterObject[] {
   const headers: oa.ParameterObject[] = route.params
     .filter((p) => p.type === 'header')
     .map((headerMeta) => {
-      const schema = getParamSchema(headerMeta) as oa.SchemaObject
+      const schema = getParamSchema(headerMeta, schemas) as oa.SchemaObject
       return {
         in: 'header' as oa.ParameterLocation,
         name: headerMeta.name || '',
@@ -101,7 +107,7 @@ export function getHeaderParams(route: IRoute): oa.ParameterObject[] {
 
   const headersMeta = route.params.find((p) => p.type === 'headers')
   if (headersMeta) {
-    const schema = getParamSchema(headersMeta) as oa.ReferenceObject
+    const schema = getParamSchema(headersMeta, schemas) as oa.ReferenceObject
     headers.push({
       in: 'header',
       name: schema.$ref.split('/').pop() || '',
@@ -119,7 +125,10 @@ export function getHeaderParams(route: IRoute): oa.ParameterObject[] {
  * Path parameters are first parsed from the path string itself, and then
  * supplemented with possible @Param() decorator values.
  */
-export function getPathParams(route: IRoute): oa.ParameterObject[] {
+export function getPathParams(
+  route: IRoute,
+  schemas: { [p: string]: oa.SchemaObject }
+): oa.ParameterObject[] {
   const path = getFullExpressPath(route)
   const tokens = pathToRegexp.parse(path)
 
@@ -142,7 +151,7 @@ export function getPathParams(route: IRoute): oa.ParameterObject[] {
         (p) => p.name === name && p.type === 'param'
       )
       if (meta) {
-        const metaSchema = getParamSchema(meta)
+        const metaSchema = getParamSchema(meta, schemas)
         param.schema =
           'type' in metaSchema ? { ...param.schema, ...metaSchema } : metaSchema
       }
@@ -161,7 +170,7 @@ export function getQueryParams(
   const queries: oa.ParameterObject[] = route.params
     .filter((p) => p.type === 'query')
     .map((queryMeta) => {
-      const schema = getParamSchema(queryMeta) as oa.SchemaObject
+      const schema = getParamSchema(queryMeta, schemas) as oa.SchemaObject
       return {
         in: 'query' as oa.ParameterLocation,
         name: queryMeta.name || '',
@@ -172,7 +181,10 @@ export function getQueryParams(
 
   const queriesMeta = route.params.find((p) => p.type === 'queries')
   if (queriesMeta) {
-    const paramSchema = getParamSchema(queriesMeta) as oa.ReferenceObject
+    const paramSchema = getParamSchema(
+      queriesMeta,
+      schemas
+    ) as oa.ReferenceObject
     // the last segment after '/'
     const paramSchemaName = paramSchema.$ref.split('/').pop() || ''
     const currentSchema = schemas[paramSchemaName]
@@ -194,7 +206,10 @@ export function getQueryParams(
 /**
  * Return OpenAPI requestBody of given route, if it has one.
  */
-export function getRequestBody(route: IRoute): oa.RequestBodyObject | void {
+export function getRequestBody(
+  route: IRoute,
+  schemas: { [p: string]: oa.SchemaObject }
+): oa.RequestBodyObject | void {
   const bodyParamMetas = route.params.filter((d) => d.type === 'body-param')
   const bodyParamsSchema: oa.SchemaObject | null =
     bodyParamMetas.length > 0
@@ -203,7 +218,7 @@ export function getRequestBody(route: IRoute): oa.RequestBodyObject | void {
             ...acc,
             properties: {
               ...acc.properties,
-              [d.name!]: getParamSchema(d),
+              [d.name!]: getParamSchema(d, schemas),
             },
             required: isRequired(d, route)
               ? [...(acc.required || []), d.name!]
@@ -216,7 +231,7 @@ export function getRequestBody(route: IRoute): oa.RequestBodyObject | void {
   const bodyMeta = route.params.find((d) => d.type === 'body')
 
   if (bodyMeta) {
-    const bodySchema = getParamSchema(bodyMeta)
+    const bodySchema = getParamSchema(bodyMeta, schemas)
     const { $ref } =
       'items' in bodySchema && bodySchema.items ? bodySchema.items : bodySchema
 
@@ -330,7 +345,8 @@ function isRequired(meta: { required?: boolean }, route: IRoute) {
  * reflection.
  */
 function getParamSchema(
-  param: ParamMetadataArgs
+  param: ParamMetadataArgs,
+  schemas: { [p: string]: oa.SchemaObject }
 ): oa.SchemaObject | oa.ReferenceObject {
   const { explicitType, index, object, method } = param
 
@@ -343,9 +359,21 @@ function getParamSchema(
     const items = explicitType
       ? { $ref: '#/components/schemas/' + explicitType.name }
       : { type: 'object' as const }
+    if (!(explicitType.name in schemas)) {
+      schemas[explicitType.name] = targetConstructorToSchema(explicitType, {
+        classTransformerMetadataStorage: defaultMetadataStorage,
+        refPointerPrefix: '#/components/schemas/',
+      }) as any
+    }
     return { items, type: 'array' }
   }
   if (explicitType) {
+    if (!(explicitType.name in schemas)) {
+      schemas[explicitType.name] = targetConstructorToSchema(explicitType, {
+        classTransformerMetadataStorage: defaultMetadataStorage,
+        refPointerPrefix: '#/components/schemas/',
+      }) as any
+    }
     return { $ref: '#/components/schemas/' + explicitType.name }
   }
   if (typeof type === 'function') {
@@ -359,6 +387,12 @@ function getParamSchema(
     } else if (type.prototype === Boolean.prototype) {
       return { type: 'boolean' }
     } else if (type.name !== 'Object') {
+      if (!(type.name in schemas)) {
+        schemas[type.name] = targetConstructorToSchema(type, {
+          classTransformerMetadataStorage: defaultMetadataStorage,
+          refPointerPrefix: '#/components/schemas/',
+        }) as any
+      }
       return { $ref: '#/components/schemas/' + type.name }
     }
   }