diff --git a/src/middleware/config.ts b/src/middleware/config.ts
index 7c8ccb6..2362a1a 100644
--- a/src/middleware/config.ts
+++ b/src/middleware/config.ts
@@ -1,6 +1,11 @@
 /* eslint-disable @typescript-eslint/no-explicit-any */
-import {Request, Response} from 'express';
-import {customFields, expressCrudProps, sequelizePropOrFunc} from '../types';
+import {NextFunction, Request, Response} from 'express';
+import {
+  customFields,
+  expressCrudProps,
+  expressFunc,
+  sequelizePropOrFunc,
+} from '../types';
 
 export const getFieldValue = async <T = any>(
   field: sequelizePropOrFunc<T>,
@@ -35,3 +40,11 @@ export const buildOptionsFromConfig = async <T extends {[prop: string]: any}>(
   }
   return newConfig;
 };
+
+export const runCustomMiddleware = (middleware?: expressFunc) => {
+  return middleware
+    ? middleware
+    : (req: Request, res: Response, next: NextFunction) => {
+        next();
+      };
+};
diff --git a/src/routes/getList.ts b/src/routes/getList.ts
index f7826a7..388bf2c 100644
--- a/src/routes/getList.ts
+++ b/src/routes/getList.ts
@@ -1,7 +1,10 @@
 /* eslint-disable @typescript-eslint/no-unused-vars */
 import {Router} from 'express';
 import {getListOptions, pureModelType} from '../types';
-import {buildOptionsFromConfig} from '../middleware/config';
+import {
+  buildOptionsFromConfig,
+  runCustomMiddleware,
+} from '../middleware/config';
 import {
   buildOptionsFromQueryParams,
   checkFilterableFields,
@@ -15,6 +18,7 @@ const getListRoute = (
 ) =>
   router.get(
     '/',
+    runCustomMiddleware(config.middleware),
     checkFilterableFields(config.filterableFields),
     checkSortableFields(config.sortableFields),
     async (req, res) => {
diff --git a/src/routes/getOne.ts b/src/routes/getOne.ts
index ed9c2cc..2c2fd12 100644
--- a/src/routes/getOne.ts
+++ b/src/routes/getOne.ts
@@ -1,26 +1,37 @@
-/* eslint-disable @typescript-eslint/no-unused-vars */
 import {Router} from 'express';
-import {getListOptions, getOneOptions, pureModelType} from '../types';
-import {buildOptionsFromConfig} from '../middleware/config';
+import {getOneOptions, pureModelType} from '../types';
+import {
+  buildOptionsFromConfig,
+  runCustomMiddleware,
+} from '../middleware/config';
 
 const getOneRoute = (
   model: pureModelType,
   router: Router,
   config: getOneOptions
 ) =>
-  router.get('/:resourceId', async (req, res) => {
-    const {middleware, ...sequelizeOptions} = config;
-    try {
-      const options = await buildOptionsFromConfig(sequelizeOptions, req, res);
+  router.get(
+    '/:resourceId',
+    runCustomMiddleware(config.middleware),
+    async (req, res) => {
+      // eslint-disable-next-line @typescript-eslint/no-unused-vars
+      const {middleware, ...sequelizeOptions} = config;
+      try {
+        const options = await buildOptionsFromConfig(
+          sequelizeOptions,
+          req,
+          res
+        );
 
-      const data = await model.findByPk(req.params.resourceId, {
-        ...options,
-      });
-      res.json(data);
-    } catch (error) {
-      console.error(error);
-      res.status(500).send(error);
+        const data = await model.findByPk(req.params.resourceId, {
+          ...options,
+        });
+        res.json(data);
+      } catch (error) {
+        console.error(error);
+        res.status(500).send(error);
+      }
     }
-  });
+  );
 
 export default getOneRoute;
diff --git a/src/types.ts b/src/types.ts
index fc0b12a..d08ef5b 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -16,7 +16,11 @@ export type modelType = ModelCtor<Model<any, any>> | string;
 // eslint-disable-next-line @typescript-eslint/no-explicit-any
 export type pureModelType = ModelCtor<Model<any, any>>;
 
-type expressFunc = (req: Request, res: Response, next: NextFunction) => void;
+export type expressFunc = (
+  req: Request,
+  res: Response,
+  next: NextFunction
+) => void;
 
 export type sequelizeFunc<T> = (req: Request, res: Response) => Promise<T>;
 
@@ -64,7 +68,7 @@ export interface getOneOptions
   extends operationFieldCore,
     expressCrudProps<Omit<NonNullFindOptions<unknown>, 'where'>> {}
 
-interface createOptions
+export interface createOptions
   extends operationFieldCore,
     expressCrudProps<CreateOptions<unknown>> {
   creatableFields?: customFields;