diff --git a/__tests__/fixtures/controllers/controllers.ts b/__tests__/fixtures/controllers/controllers.ts
new file mode 100644
index 0000000..3e3014b
--- /dev/null
+++ b/__tests__/fixtures/controllers/controllers.ts
@@ -0,0 +1 @@
+export * from '../controllers'
diff --git a/__tests__/index.test.ts b/__tests__/index.test.ts
index e03b01c..e90b901 100644
--- a/__tests__/index.test.ts
+++ b/__tests__/index.test.ts
@@ -2,12 +2,13 @@
 const { defaultMetadataStorage } = require('class-transformer/cjs/storage')
 import { validationMetadatasToSchemas } from 'class-validator-jsonschema'
 import _merge from 'lodash.merge'
-import { getMetadataArgsStorage } from 'routing-controllers'
+import { getMetadataArgsStorage, MetadataArgsStorage, RoutingControllersOptions } from 'routing-controllers'
 
 import {
   expressToOpenAPIPath,
   getFullPath,
   getOperationId,
+  IRoute,
   parseRoutes,
   routingControllersToSpec,
 } from '../src'
@@ -18,283 +19,301 @@ import {
   UsersController,
 } from './fixtures/controllers'
 
-// Construct OpenAPI spec:
-const storage = getMetadataArgsStorage()
-const options = {
-  controllers: [UsersController, UserPostsController],
-  routePrefix: '/api',
-}
-const routes = parseRoutes(storage, options)
-
-describe('index', () => {
-  it('generates an OpenAPI spec from routing-controllers metadata', () => {
-    // Include component schemas parsed with class-validator-jsonschema:
-    const schemas = validationMetadatasToSchemas({
-      classTransformerMetadataStorage: defaultMetadataStorage,
-      refPointerPrefix: '#/components/schemas/',
-    })
-
-    const spec = routingControllersToSpec(storage, options, {
-      components: {
-        schemas,
-        securitySchemes: {
-          basicAuth: {
-            scheme: 'basic',
-            type: 'http',
-          },
-          bearerAuth: {
-            scheme: 'bearer',
-            type: 'http',
-          },
-        },
-      },
-      info: { title: 'My app', version: '1.2.0' },
-    })
-    expect(spec).toEqual(require('./fixtures/spec.json'))
-  })
-
-  it('parses actions in declared order from controller metadata', () => {
-    const actions = routes.map((d) => d.action)
-    expect(actions).toEqual([
-      {
-        method: 'listUsers',
-        route: '/',
-        target: UsersController,
-        type: 'get',
-      },
-      {
-        method: 'listUsersInRange',
-        route: '/:from-:to',
-        target: UsersController,
-        type: 'get',
-      },
-      {
-        method: 'getUser',
-        route: '/:userId?',
-        target: UsersController,
-        type: 'get',
-      },
-      {
-        method: 'createUser',
-        route: '/',
-        target: UsersController,
-        type: 'post',
-      },
-      {
-        method: 'createUserWithType',
-        route: '/withType',
-        target: UsersController,
-        type: 'post',
-      },
-      {
-        method: 'createManyUsers',
-        route: '/',
-        target: UsersController,
-        type: 'put',
-      },
-      {
-        method: 'createNestedUsers',
-        route: '/nested',
-        target: UsersController,
-        type: 'post',
-      },
-      {
-        method: 'createUserPost',
-        route: '/:userId/posts',
-        target: UsersController,
-        type: 'post',
-      },
-      {
-        method: 'deleteUsersByVersion',
-        route: '/:version(v?\\d{1}|all)',
-        target: UsersController,
-        type: 'delete',
-      },
-      {
-        method: 'putUserDefault',
-        route: undefined,
-        target: UsersController,
-        type: 'put',
-      },
-      {
-        method: 'getUserPost',
-        route: '/:postId',
-        target: UserPostsController,
-        type: 'get',
-      },
-      {
-        method: 'patchUserPost',
-        route: '/:postId',
-        target: UserPostsController,
-        type: 'patch',
-      },
-      {
-        method: 'getDefaultPath',
-        route: undefined,
-        target: RootController,
-        type: 'get',
-      },
-      {
-        method: 'getStringPath',
-        route: '/stringPath',
-        target: RootController,
-        type: 'get',
-      },
-    ])
-  })
-
-  it('gets full OpenAPI-formatted paths', () => {
-    const route = _merge({}, routes[0])
-    expect(getFullPath(route)).toEqual('/api/users/')
-
-    route.options.routePrefix = undefined
-    expect(getFullPath(route)).toEqual('/users/')
-
-    route.controller.route = ''
-    expect(getFullPath(route)).toEqual('/')
-
-    route.action.route = '/all'
-    expect(getFullPath(route)).toEqual('/all')
-  })
+describe('construct routes by passing classes for controllers', () => {
+  // Construct OpenAPI spec:
+  const storage = getMetadataArgsStorage()
+  const options = {
+    controllers: [UsersController, UserPostsController],
+    routePrefix: '/api',
+  }
+  const routes = parseRoutes(storage, options)
 
-  it('converts Express paths into OpenAPI paths', () => {
-    expect(expressToOpenAPIPath('')).toEqual('')
-    expect(expressToOpenAPIPath('/')).toEqual('/')
-    expect(expressToOpenAPIPath('123')).toEqual('123')
-    expect(expressToOpenAPIPath('/users')).toEqual('/users')
-    expect(expressToOpenAPIPath('/users/:userId')).toEqual('/users/{userId}')
-    expect(expressToOpenAPIPath('/users/:userId/:from-:to')).toEqual(
-      '/users/{userId}/{from}-{to}'
-    )
-    expect(expressToOpenAPIPath('/users/:userId/:limit?')).toEqual(
-      '/users/{userId}/{limit}'
-    )
-    expect(expressToOpenAPIPath('/users/:userId(\\d+)')).toEqual(
-      '/users/{userId}'
-    )
-    expect(expressToOpenAPIPath('/users/:type(user|admin)')).toEqual(
-      '/users/{type}'
-    )
-  })
+  runTestCases(storage, options, routes)
+})
 
-  it('gets OpenAPI Operation IDs', () => {
-    const route = _merge({}, routes[0])
-    expect(getOperationId(route)).toEqual('UsersController.listUsers')
+describe('construct routes by passing directories for controllers', () => {
+  // Construct OpenAPI spec:
+  const storage = getMetadataArgsStorage()
+  const options = {
+    controllers: [`${__dirname}/fixtures/controllers/**/*.ts`],
+    routePrefix: '/api',
+  }
+  const routes = parseRoutes(storage, options)
 
-    route.action.target = class AnotherController {}
-    route.action.method = 'anotherMethod'
-    expect(getOperationId(route)).toEqual('AnotherController.anotherMethod')
-  })
+  runTestCases(storage, options, routes)
 })
 
-describe('getRequestBody', () => {
-  it('parse a single `body` metadata item into a single `object` schema', () => {
-    const route = routes.find((d) => d.action.method === 'createUser')!
-    expect(route).toBeDefined()
-    expect(getRequestBody(route)).toEqual({
-      content: {
-        'application/json': {
-          schema: {
-            $ref: '#/components/schemas/CreateUserBody',
+function runTestCases(storage: MetadataArgsStorage, options: RoutingControllersOptions, routes: IRoute[]) {
+  describe('index', () => {
+    it('generates an OpenAPI spec from routing-controllers metadata', () => {
+      // Include component schemas parsed with class-validator-jsonschema:
+      const schemas = validationMetadatasToSchemas({
+        classTransformerMetadataStorage: defaultMetadataStorage,
+        refPointerPrefix: '#/components/schemas/',
+      })
+  
+      const spec = routingControllersToSpec(storage, options, {
+        components: {
+          schemas,
+          securitySchemes: {
+            basicAuth: {
+              scheme: 'basic',
+              type: 'http',
+            },
+            bearerAuth: {
+              scheme: 'bearer',
+              type: 'http',
+            },
           },
         },
-      },
-      description: 'CreateUserBody',
-      required: false,
+        info: { title: 'My app', version: '1.2.0' },
+      })
+      expect(spec).toEqual(require('./fixtures/spec.json'))
+    })
+  
+    it('parses actions in declared order from controller metadata', () => {
+      const actions = routes.map((d) => d.action)
+      expect(actions).toEqual([
+        {
+          method: 'listUsers',
+          route: '/',
+          target: UsersController,
+          type: 'get',
+        },
+        {
+          method: 'listUsersInRange',
+          route: '/:from-:to',
+          target: UsersController,
+          type: 'get',
+        },
+        {
+          method: 'getUser',
+          route: '/:userId?',
+          target: UsersController,
+          type: 'get',
+        },
+        {
+          method: 'createUser',
+          route: '/',
+          target: UsersController,
+          type: 'post',
+        },
+        {
+          method: 'createUserWithType',
+          route: '/withType',
+          target: UsersController,
+          type: 'post',
+        },
+        {
+          method: 'createManyUsers',
+          route: '/',
+          target: UsersController,
+          type: 'put',
+        },
+        {
+          method: 'createNestedUsers',
+          route: '/nested',
+          target: UsersController,
+          type: 'post',
+        },
+        {
+          method: 'createUserPost',
+          route: '/:userId/posts',
+          target: UsersController,
+          type: 'post',
+        },
+        {
+          method: 'deleteUsersByVersion',
+          route: '/:version(v?\\d{1}|all)',
+          target: UsersController,
+          type: 'delete',
+        },
+        {
+          method: 'putUserDefault',
+          route: undefined,
+          target: UsersController,
+          type: 'put',
+        },
+        {
+          method: 'getUserPost',
+          route: '/:postId',
+          target: UserPostsController,
+          type: 'get',
+        },
+        {
+          method: 'patchUserPost',
+          route: '/:postId',
+          target: UserPostsController,
+          type: 'patch',
+        },
+        {
+          method: 'getDefaultPath',
+          route: undefined,
+          target: RootController,
+          type: 'get',
+        },
+        {
+          method: 'getStringPath',
+          route: '/stringPath',
+          target: RootController,
+          type: 'get',
+        },
+      ])
+    })
+  
+    it('gets full OpenAPI-formatted paths', () => {
+      const route = _merge({}, routes[0])
+      expect(getFullPath(route)).toEqual('/api/users/')
+  
+      route.options.routePrefix = undefined
+      expect(getFullPath(route)).toEqual('/users/')
+  
+      route.controller.route = ''
+      expect(getFullPath(route)).toEqual('/')
+  
+      route.action.route = '/all'
+      expect(getFullPath(route)).toEqual('/all')
+    })
+  
+    it('converts Express paths into OpenAPI paths', () => {
+      expect(expressToOpenAPIPath('')).toEqual('')
+      expect(expressToOpenAPIPath('/')).toEqual('/')
+      expect(expressToOpenAPIPath('123')).toEqual('123')
+      expect(expressToOpenAPIPath('/users')).toEqual('/users')
+      expect(expressToOpenAPIPath('/users/:userId')).toEqual('/users/{userId}')
+      expect(expressToOpenAPIPath('/users/:userId/:from-:to')).toEqual(
+        '/users/{userId}/{from}-{to}'
+      )
+      expect(expressToOpenAPIPath('/users/:userId/:limit?')).toEqual(
+        '/users/{userId}/{limit}'
+      )
+      expect(expressToOpenAPIPath('/users/:userId(\\d+)')).toEqual(
+        '/users/{userId}'
+      )
+      expect(expressToOpenAPIPath('/users/:type(user|admin)')).toEqual(
+        '/users/{type}'
+      )
+    })
+  
+    it('gets OpenAPI Operation IDs', () => {
+      const route = _merge({}, routes[0])
+      expect(getOperationId(route)).toEqual('UsersController.listUsers')
+  
+      route.action.target = class AnotherController {}
+      route.action.method = 'anotherMethod'
+      expect(getOperationId(route)).toEqual('AnotherController.anotherMethod')
     })
   })
-
-  it('parse a single `body` metadata item of array type into a single `object` schema', () => {
-    const route = routes.find((d) => d.action.method === 'createManyUsers')!
-    expect(route).toBeDefined()
-    expect(getRequestBody(route)).toEqual({
-      content: {
-        'application/json': {
-          schema: {
-            items: {
+  
+  describe('getRequestBody', () => {
+    it('parse a single `body` metadata item into a single `object` schema', () => {
+      const route = routes.find((d) => d.action.method === 'createUser')!
+      expect(route).toBeDefined()
+      expect(getRequestBody(route)).toEqual({
+        content: {
+          'application/json': {
+            schema: {
               $ref: '#/components/schemas/CreateUserBody',
             },
-            type: 'array',
           },
         },
-      },
-      description: 'CreateUserBody',
-      required: true,
+        description: 'CreateUserBody',
+        required: false,
+      })
     })
-  })
-
-  it('parse a single `body-param` metadata item into a single `object` schema', () => {
-    const route = routes.find((d) => d.action.method === 'patchUserPost')!
-    expect(route).toBeDefined()
-    expect(getRequestBody(route)).toEqual({
-      content: {
-        'application/json': {
-          schema: {
-            properties: {
-              token: {
-                type: 'string',
+  
+    it('parse a single `body` metadata item of array type into a single `object` schema', () => {
+      const route = routes.find((d) => d.action.method === 'createManyUsers')!
+      expect(route).toBeDefined()
+      expect(getRequestBody(route)).toEqual({
+        content: {
+          'application/json': {
+            schema: {
+              items: {
+                $ref: '#/components/schemas/CreateUserBody',
               },
+              type: 'array',
             },
-            required: [],
-            type: 'object',
           },
         },
-      },
+        description: 'CreateUserBody',
+        required: true,
+      })
     })
-  })
-
-  it('combine multiple `body-param` metadata items into a single `object` schema', () => {
-    const route = routes.find((d) => d.action.method === 'putUserDefault')!
-    expect(route).toBeDefined()
-    expect(getRequestBody(route)).toEqual({
-      content: {
-        'application/json': {
-          schema: {
-            properties: {
-              limit: {
-                type: 'number',
-              },
-              query: {
-                $ref: '#/components/schemas/UserQuery',
-              },
-              token: {
-                type: 'string',
+  
+    it('parse a single `body-param` metadata item into a single `object` schema', () => {
+      const route = routes.find((d) => d.action.method === 'patchUserPost')!
+      expect(route).toBeDefined()
+      expect(getRequestBody(route)).toEqual({
+        content: {
+          'application/json': {
+            schema: {
+              properties: {
+                token: {
+                  type: 'string',
+                },
               },
+              required: [],
+              type: 'object',
             },
-            required: ['token'],
-            type: 'object',
           },
         },
-      },
+      })
     })
-  })
-
-  it('wrap `body` and `body-param` metadata items under a single `allOf` schema', () => {
-    const route = routes.find((d) => d.action.method === 'createUserPost')!
-    expect(route).toBeDefined()
-    expect(getRequestBody(route)).toEqual({
-      content: {
-        'application/json': {
-          schema: {
-            allOf: [
-              {
-                $ref: '#/components/schemas/CreatePostBody',
+  
+    it('combine multiple `body-param` metadata items into a single `object` schema', () => {
+      const route = routes.find((d) => d.action.method === 'putUserDefault')!
+      expect(route).toBeDefined()
+      expect(getRequestBody(route)).toEqual({
+        content: {
+          'application/json': {
+            schema: {
+              properties: {
+                limit: {
+                  type: 'number',
+                },
+                query: {
+                  $ref: '#/components/schemas/UserQuery',
+                },
+                token: {
+                  type: 'string',
+                },
               },
-              {
-                properties: {
-                  token: {
-                    type: 'string',
+              required: ['token'],
+              type: 'object',
+            },
+          },
+        },
+      })
+    })
+  
+    it('wrap `body` and `body-param` metadata items under a single `allOf` schema', () => {
+      const route = routes.find((d) => d.action.method === 'createUserPost')!
+      expect(route).toBeDefined()
+      expect(getRequestBody(route)).toEqual({
+        content: {
+          'application/json': {
+            schema: {
+              allOf: [
+                {
+                  $ref: '#/components/schemas/CreatePostBody',
+                },
+                {
+                  properties: {
+                    token: {
+                      type: 'string',
+                    },
                   },
+                  required: [],
+                  type: 'object',
                 },
-                required: [],
-                type: 'object',
-              },
-            ],
+              ],
+            },
           },
         },
-      },
-      description: 'CreatePostBody',
-      required: true,
+        description: 'CreatePostBody',
+        required: true,
+      })
     })
   })
-})
+}
diff --git a/package-lock.json b/package-lock.json
index a808182..70d2a80 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -886,6 +886,17 @@
       "integrity": "sha512-9IK9EadsbHo6jLWIpxpR6pL0sazTXV6+SQv25ZB+F7Bj9mJNaOc4nCRabwd5M/JwmUa8idz6Eci6eKfJryPs6Q==",
       "dev": true
     },
+    "accepts": {
+      "version": "1.3.7",
+      "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.7.tgz",
+      "integrity": "sha512-Il80Qs2WjYlJIBNzNkK6KYqlVMTbZLXgHx2oT0pU/fjRHyEp+PEfEPY0R3WCwAGVOtauxh1hOxNgIf5bv7dQpA==",
+      "dev": true,
+      "optional": true,
+      "requires": {
+        "mime-types": "~2.1.24",
+        "negotiator": "0.6.2"
+      }
+    },
     "acorn": {
       "version": "8.1.0",
       "resolved": "https://registry.npmjs.org/acorn/-/acorn-8.1.0.tgz",
@@ -969,6 +980,13 @@
         "color-convert": "^2.0.1"
       }
     },
+    "any-promise": {
+      "version": "1.3.0",
+      "resolved": "https://registry.npmjs.org/any-promise/-/any-promise-1.3.0.tgz",
+      "integrity": "sha1-q8av7tzqUugJzcA3au0845Y10X8=",
+      "dev": true,
+      "optional": true
+    },
     "anymatch": {
       "version": "3.1.1",
       "resolved": "https://registry.npmjs.org/anymatch/-/anymatch-3.1.1.tgz",
@@ -979,6 +997,13 @@
         "picomatch": "^2.0.4"
       }
     },
+    "append-field": {
+      "version": "0.1.0",
+      "resolved": "https://registry.npmjs.org/append-field/-/append-field-0.1.0.tgz",
+      "integrity": "sha1-bdxY+gg8e8VF08WZWygwzCNm1Eo=",
+      "dev": true,
+      "optional": true
+    },
     "argparse": {
       "version": "1.0.10",
       "resolved": "https://registry.npmjs.org/argparse/-/argparse-1.0.10.tgz",
@@ -1012,6 +1037,13 @@
       "integrity": "sha1-45sJrqne+Gao8gbiiK9jkZuuOcQ=",
       "dev": true
     },
+    "array-flatten": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz",
+      "integrity": "sha1-ml9pkFGx5wczKPKgCJaLZOopVdI=",
+      "dev": true,
+      "optional": true
+    },
     "array-unique": {
       "version": "0.3.2",
       "resolved": "https://registry.npmjs.org/array-unique/-/array-unique-0.3.2.tgz",
@@ -1137,8 +1169,7 @@
     "balanced-match": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.0.tgz",
-      "integrity": "sha1-ibTRmasr7kneFk6gK4nORi1xt2c=",
-      "dev": true
+      "integrity": "sha1-ibTRmasr7kneFk6gK4nORi1xt2c="
     },
     "base": {
       "version": "0.11.2",
@@ -1204,11 +1235,55 @@
         "tweetnacl": "^0.14.3"
       }
     },
+    "body-parser": {
+      "version": "1.19.0",
+      "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-1.19.0.tgz",
+      "integrity": "sha512-dhEPs72UPbDnAQJ9ZKMNTP6ptJaionhP5cBb541nXPlW60Jepo9RV/a4fX4XWW9CuFNK22krhrj1+rgzifNCsw==",
+      "dev": true,
+      "optional": true,
+      "requires": {
+        "bytes": "3.1.0",
+        "content-type": "~1.0.4",
+        "debug": "2.6.9",
+        "depd": "~1.1.2",
+        "http-errors": "1.7.2",
+        "iconv-lite": "0.4.24",
+        "on-finished": "~2.3.0",
+        "qs": "6.7.0",
+        "raw-body": "2.4.0",
+        "type-is": "~1.6.17"
+      },
+      "dependencies": {
+        "debug": {
+          "version": "2.6.9",
+          "resolved": "https://registry.npmjs.org/debug/-/debug-2.6.9.tgz",
+          "integrity": "sha512-bC7ElrdJaJnPbAP+1EotYvqZsb3ecl5wi6Bfi6BJTUcNowp6cvspg0jXznRTKDjm/E7AdgFBVeAPVMNcKGsHMA==",
+          "dev": true,
+          "optional": true,
+          "requires": {
+            "ms": "2.0.0"
+          }
+        },
+        "ms": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/ms/-/ms-2.0.0.tgz",
+          "integrity": "sha1-VgiurfwAvmwpAd9fmGF4jeDVl8g=",
+          "dev": true,
+          "optional": true
+        },
+        "qs": {
+          "version": "6.7.0",
+          "resolved": "https://registry.npmjs.org/qs/-/qs-6.7.0.tgz",
+          "integrity": "sha512-VCdBRNFTX1fyE7Nb6FYoURo/SPe62QCaAyzJvUjwRaIsc+NePBEniHlvxFmmX56+HZphIGtV0XeCirBtpDrTyQ==",
+          "dev": true,
+          "optional": true
+        }
+      }
+    },
     "brace-expansion": {
       "version": "1.1.11",
       "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.11.tgz",
       "integrity": "sha512-iCuPHDFgrHX7H2vEI/5xpz07zSHB00TpugqhmYtVmMO6518mCuRMoOYFldEBl0g187ufozdaHgWKcYFb61qGiA==",
-      "dev": true,
       "requires": {
         "balanced-match": "^1.0.0",
         "concat-map": "0.0.1"
@@ -1272,6 +1347,24 @@
       "integrity": "sha1-Jw8HbFpywC9bZaR9+Uxf46J4iS8=",
       "dev": true
     },
+    "busboy": {
+      "version": "0.2.14",
+      "resolved": "https://registry.npmjs.org/busboy/-/busboy-0.2.14.tgz",
+      "integrity": "sha1-bCpiLvz0fFe7vh4qnDetNseSVFM=",
+      "dev": true,
+      "optional": true,
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       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/unset-value/-/unset-value-1.0.0.tgz",
@@ -5188,6 +6236,13 @@
         "punycode": "^2.1.0"
       }
     },
+    "urijs": {
+      "version": "1.19.6",
+      "resolved": "https://registry.npmjs.org/urijs/-/urijs-1.19.6.tgz",
+      "integrity": "sha512-eSXsXZ2jLvGWeLYlQA3Gh36BcjF+0amo92+wHPyN1mdR8Nxf75fuEuYTd9c0a+m/vhCjRK0ESlE9YNLW+E1VEw==",
+      "dev": true,
+      "optional": true
+    },
     "urix": {
       "version": "0.1.0",
       "resolved": "https://registry.npmjs.org/urix/-/urix-0.1.0.tgz",
@@ -5206,6 +6261,20 @@
       "integrity": "sha512-cwESVXlO3url9YWlFW/TA9cshCEhtu7IKJ/p5soJ/gGpj7vbvFrAY/eIioQ6Dw23KjZhYgiIo8HOs1nQ2vr/oQ==",
       "dev": true
     },
+    "util-deprecate": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
+      "integrity": "sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8=",
+      "dev": true,
+      "optional": true
+    },
+    "utils-merge": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/utils-merge/-/utils-merge-1.0.1.tgz",
+      "integrity": "sha1-n5VxD1CiZ5R7LMwSR0HBAoQn5xM=",
+      "dev": true,
+      "optional": true
+    },
     "uuid": {
       "version": "3.4.0",
       "resolved": "https://registry.npmjs.org/uuid/-/uuid-3.4.0.tgz",
@@ -5247,6 +6316,13 @@
       "integrity": "sha512-mD45p0rvHVBlY2Zuy3F3ESIe1h5X58GPfAtslBjY7EtTqGquZTj+VX/J4RnHWN8FKq0C9WRVt1oWAcytWRuYLQ==",
       "dev": true
     },
+    "vary": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/vary/-/vary-1.1.2.tgz",
+      "integrity": "sha1-IpnwLG3tMNSllhsLn3RSShj2NPw=",
+      "dev": true,
+      "optional": true
+    },
     "verror": {
       "version": "1.10.0",
       "resolved": "https://registry.npmjs.org/verror/-/verror-1.10.0.tgz",
@@ -5352,8 +6428,7 @@
     "wrappy": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
-      "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=",
-      "dev": true
+      "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8="
     },
     "write-file-atomic": {
       "version": "3.0.3",
@@ -5385,6 +6460,13 @@
       "integrity": "sha512-JZnDKK8B0RCDw84FNdDAIpZK+JuJw+s7Lz8nksI7SIuU3UXJJslUthsi+uWBUYOwPFwW7W7PRLRfUKpxjtjFCw==",
       "dev": true
     },
+    "xtend": {
+      "version": "4.0.2",
+      "resolved": "https://registry.npmjs.org/xtend/-/xtend-4.0.2.tgz",
+      "integrity": "sha512-LKYU1iAXJXUgAXn9URjiu+MWhyUXHsvfp7mcuYm9dSUKK0/CjtrUwFAxD82/mCWbtLsGjFIad0wIsod4zrTAEQ==",
+      "dev": true,
+      "optional": true
+    },
     "y18n": {
       "version": "4.0.1",
       "resolved": "https://registry.npmjs.org/y18n/-/y18n-4.0.1.tgz",
@@ -5430,6 +6512,13 @@
         "camelcase": "^5.0.0",
         "decamelize": "^1.2.0"
       }
+    },
+    "ylru": {
+      "version": "1.2.1",
+      "resolved": "https://registry.npmjs.org/ylru/-/ylru-1.2.1.tgz",
+      "integrity": "sha512-faQrqNMzcPCHGVC2aaOINk13K+aaBDUPjGWl0teOXywElLjyVAB6Oe2jj62jHYtwsU49jXhScYbvPENK+6zAvQ==",
+      "dev": true,
+      "optional": true
     }
   }
 }
diff --git a/package.json b/package.json
index d5e8906..91ad450 100644
--- a/package.json
+++ b/package.json
@@ -29,8 +29,9 @@
     "singleQuote": true
   },
   "dependencies": {
-    "lodash.merge": "^4.6.2",
+    "glob": "^7.1.7",
     "lodash.capitalize": "^4.2.1",
+    "lodash.merge": "^4.6.2",
     "lodash.startcase": "^4.4.0",
     "openapi3-ts": "^2.0.1",
     "path-to-regexp": "^2.2.1",
@@ -40,8 +41,8 @@
   "devDependencies": {
     "@team-griffin/install-self-peers": "^1.1.1",
     "@types/jest": "^26.0.20",
-    "@types/lodash.merge": "^4.6.6",
     "@types/lodash.capitalize": "^4.2.6",
+    "@types/lodash.merge": "^4.6.6",
     "@types/lodash.startcase": "^4.4.6",
     "@types/node": "^13.13.46",
     "@types/prettier": "^2.2.2",
@@ -54,6 +55,7 @@
     "jest": "^26.6.3",
     "prettier": "^2.2.1",
     "rimraf": "^3.0.2",
+    "routing-controllers": "^0.9.0",
     "ts-jest": "^26.5.3",
     "tslint": "^6.1.3",
     "tslint-config-prettier": "^1.18.0",
diff --git a/src/importClassesFromDirectories.ts b/src/importClassesFromDirectories.ts
new file mode 100644
index 0000000..b3aefa8
--- /dev/null
+++ b/src/importClassesFromDirectories.ts
@@ -0,0 +1,41 @@
+import * as path from 'path'
+
+/**
+ * Loads all exported classes from the given directory.
+ */
+export function importClassesFromDirectories(
+  directories: string[],
+  formats = ['.js', '.ts', '.tsx']
+): Function[] {
+  const loadFileClasses = function (exported: any, allLoaded: Function[]) {
+    if (exported instanceof Function) {
+      allLoaded.push(exported)
+    } else if (exported instanceof Array) {
+      exported.forEach((i: any) => loadFileClasses(i, allLoaded))
+    } else if (exported instanceof Object || typeof exported === 'object') {
+      Object.keys(exported).forEach((key) =>
+        loadFileClasses(exported[key], allLoaded)
+      )
+    }
+
+    return allLoaded
+  }
+
+  const allFiles = directories.reduce((allDirs, dir) => {
+    // eslint-disable-next-line @typescript-eslint/no-var-requires
+    return allDirs.concat(require('glob').sync(path.normalize(dir)))
+  }, [] as string[])
+
+  const dirs = allFiles
+    .filter((file) => {
+      const dtsExtension = file.substring(file.length - 5, file.length)
+      return (
+        formats.indexOf(path.extname(file)) !== -1 && dtsExtension !== '.d.ts'
+      )
+    })
+    .map((file) => {
+      return require(file)
+    })
+
+  return loadFileClasses(dirs, [])
+}
diff --git a/src/parseMetadata.ts b/src/parseMetadata.ts
index 4deb1a1..d289b32 100644
--- a/src/parseMetadata.ts
+++ b/src/parseMetadata.ts
@@ -7,6 +7,7 @@ import { ActionMetadataArgs } from 'routing-controllers/types/metadata/args/Acti
 import { ControllerMetadataArgs } from 'routing-controllers/types/metadata/args/ControllerMetadataArgs'
 import { ParamMetadataArgs } from 'routing-controllers/types/metadata/args/ParamMetadataArgs'
 import { ResponseHandlerMetadataArgs } from 'routing-controllers/types/metadata/args/ResponseHandleMetadataArgs'
+import { importClassesFromDirectories } from './importClassesFromDirectories'
 
 /**
  * All the context for a single route.
@@ -26,6 +27,15 @@ export function parseRoutes(
   storage: MetadataArgsStorage,
   options: RoutingControllersOptions = {}
 ): IRoute[] {
+  // import all controllers and middlewares and error handlers (new way)
+  if (options && options.controllers && options.controllers.length) {
+    let controllerClasses: Function[];
+    controllerClasses = (options.controllers as any[]).filter(controller => controller instanceof Function);
+    const controllerDirs = (options.controllers as any[]).filter(controller => typeof controller === 'string');
+    controllerClasses.push(...importClassesFromDirectories(controllerDirs));
+    options.controllers = controllerClasses;
+  }
+  
   return storage.actions.map((action) => ({
     action,
     controller: storage.controllers.find(