diff --git a/src/OpenApiLibCore/openapi_libcore.py b/src/OpenApiLibCore/openapi_libcore.py
index 39f96d1..e0bebc5 100644
--- a/src/OpenApiLibCore/openapi_libcore.py
+++ b/src/OpenApiLibCore/openapi_libcore.py
@@ -131,7 +131,7 @@
 from typing import Any, Dict, List, Optional, Set, Tuple, Type, Union
 from uuid import uuid4
 
-from openapi_core import Spec, validate_response
+from openapi_core import Config, OpenAPI, Spec
 from openapi_core.contrib.requests import (
     RequestsOpenAPIRequest,
     RequestsOpenAPIResponse,
@@ -633,10 +633,14 @@ def validate_response_vs_spec(
         Validate the reponse for a given request against the OpenAPI Spec that is
         loaded during library initialization.
         """
-        _ = validate_response(
-            spec=self.validation_spec,
-            request=request,
-            response=response,
+        if response.content_type == "application/json":
+            config = None
+        else:
+            extra_deserializer = {response.content_type: _json.loads}
+            config = Config(extra_media_type_deserializers=extra_deserializer)
+
+        OpenAPI(spec=self.validation_spec, config=config).validate_response(
+            request, response
         )
 
     @keyword