diff --git a/package-lock.json b/package-lock.json
index 61ab4e5c..e27c8696 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "express-openapi-validator",
-  "version": "2.3.0",
+  "version": "2.3.1",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/package.json b/package.json
index caf5883c..bbdb9f72 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "express-openapi-validator",
-  "version": "2.3.0",
+  "version": "2.3.1",
   "description": "Automatically validate API requests using an OpenAPI 3 and Express.",
   "main": "dist/index.js",
   "scripts": {
diff --git a/src/middlewares/openapi.response.validator.ts b/src/middlewares/openapi.response.validator.ts
index ab718c40..a9e54f82 100644
--- a/src/middlewares/openapi.response.validator.ts
+++ b/src/middlewares/openapi.response.validator.ts
@@ -25,7 +25,7 @@ export class ResponseValidator {
   }
 
   validate() {
-    return mung.jsonAsync((body, req: any, res) => {
+    return mung.json((body, req: any, res) => {
       if (req.openapi) {
         const responses = req.openapi.schema && req.openapi.schema.responses;
         const validators = this._getOrBuildValidator(req, responses);