diff --git a/openapi_core/deserializing/parameters/factories.py b/openapi_core/deserializing/parameters/factories.py
index f9cfa504..85288e67 100644
--- a/openapi_core/deserializing/parameters/factories.py
+++ b/openapi_core/deserializing/parameters/factories.py
@@ -1,5 +1,3 @@
-import warnings
-
 from openapi_core.deserializing.parameters.deserializers import (
     PrimitiveDeserializer,
 )
@@ -16,12 +14,6 @@ class ParameterDeserializersFactory(object):
     }
 
     def create(self, param):
-        if param.getkey('deprecated', False):
-            warnings.warn(
-                "{0} parameter is deprecated".format(param['name']),
-                DeprecationWarning,
-            )
-
         style = get_style(param)
 
         deserialize_callable = self.PARAMETER_STYLE_DESERIALIZERS[style]
diff --git a/openapi_core/validation/request/validators.py b/openapi_core/validation/request/validators.py
index 58df805b..f19e86e3 100644
--- a/openapi_core/validation/request/validators.py
+++ b/openapi_core/validation/request/validators.py
@@ -1,6 +1,7 @@
 """OpenAPI core validation request validators module"""
 from __future__ import division
 from itertools import chain
+import warnings
 
 from openapi_core.casting.schemas.exceptions import CastError
 from openapi_core.deserializing.exceptions import DeserializeError
@@ -160,41 +161,52 @@ def _get_parameters(self, request, params):
                 continue
             seen.add((param_name, param_location))
             try:
-                raw_value = self._get_parameter_value(param, request)
-            except MissingRequiredParameter as exc:
-                errors.append(exc)
-                continue
+                value = self._get_parameter(param, request)
             except MissingParameter:
-                if 'schema' not in param:
-                    continue
-                schema = param / 'schema'
-                if 'default' not in schema:
-                    continue
-                casted = schema['default']
-            else:
-                try:
-                    deserialised = self._deserialise_parameter(
-                        param, raw_value)
-                except DeserializeError as exc:
-                    errors.append(exc)
-                    continue
-
-                try:
-                    casted = self._cast(param, deserialised)
-                except CastError as exc:
-                    errors.append(exc)
-                    continue
-
-            try:
-                unmarshalled = self._unmarshal(param, casted)
-            except (ValidateError, UnmarshalError) as exc:
+                continue
+            except (
+                MissingRequiredParameter, DeserializeError,
+                CastError, ValidateError, UnmarshalError,
+            ) as exc:
                 errors.append(exc)
+                continue
             else:
                 locations.setdefault(param_location, {})
-                locations[param_location][param_name] = unmarshalled
+                locations[param_location][param_name] = value
 
         return RequestParameters(**locations), errors
 
+    def _get_parameter(self, param, request):
+        if param.getkey('deprecated', False):
+            warnings.warn(
+                "{0} parameter is deprecated".format(param['name']),
+                DeprecationWarning,
+            )
+
+        try:
+            raw_value = self._get_parameter_value(param, request)
+        except MissingParameter:
+            if 'schema' not in param:
+                raise
+            schema = param / 'schema'
+            if 'default' not in schema:
+                raise
+            casted = schema['default']
+        else:
+            # Simple scenario
+            if 'content' not in param:
+                deserialised = self._deserialise_parameter(param, raw_value)
+                schema = param / 'schema'
+            # Complex scenario
+            else:
+                content = param / 'content'
+                mimetype, media_type = next(content.items())
+                deserialised = self._deserialise_data(mimetype, raw_value)
+                schema = media_type / 'schema'
+            casted = self._cast(schema, deserialised)
+        unmarshalled = self._unmarshal(schema, casted)
+        return unmarshalled
+
     def _get_body(self, request, operation):
         if 'requestBody' not in operation:
             return None, []
@@ -224,8 +236,12 @@ def _get_body(self, request, operation):
         except CastError as exc:
             return None, [exc, ]
 
+        if 'schema' not in media_type:
+            return casted, []
+
+        schema = media_type / 'schema'
         try:
-            body = self._unmarshal(media_type, casted)
+            body = self._unmarshal(schema, casted)
         except (ValidateError, UnmarshalError) as exc:
             return None, [exc, ]
 
diff --git a/openapi_core/validation/response/validators.py b/openapi_core/validation/response/validators.py
index 0013f292..f1cdb0c3 100644
--- a/openapi_core/validation/response/validators.py
+++ b/openapi_core/validation/response/validators.py
@@ -105,8 +105,12 @@ def _get_data(self, response, operation_response):
         except CastError as exc:
             return None, [exc, ]
 
+        if 'schema' not in media_type:
+            return casted, []
+
+        schema = media_type / 'schema'
         try:
-            data = self._unmarshal(media_type, casted)
+            data = self._unmarshal(schema, casted)
         except (ValidateError, UnmarshalError) as exc:
             return None, [exc, ]
 
diff --git a/openapi_core/validation/validators.py b/openapi_core/validation/validators.py
index a50fc6b7..55a3f109 100644
--- a/openapi_core/validation/validators.py
+++ b/openapi_core/validation/validators.py
@@ -52,19 +52,10 @@ def _deserialise_data(self, mimetype, value):
         deserializer = self.media_type_deserializers_factory.create(mimetype)
         return deserializer(value)
 
-    def _cast(self, param_or_media_type, value):
-        # return param_or_media_type.cast(value)
-        if 'schema' not in param_or_media_type:
-            return value
-
-        schema = param_or_media_type / 'schema'
+    def _cast(self, schema, value):
         caster = self.schema_casters_factory.create(schema)
         return caster(value)
 
-    def _unmarshal(self, param_or_media_type, value):
-        if 'schema' not in param_or_media_type:
-            return value
-
-        schema = param_or_media_type / 'schema'
+    def _unmarshal(self, schema, value):
         unmarshaller = self.schema_unmarshallers_factory.create(schema)
         return unmarshaller(value)
diff --git a/tests/integration/data/v3.0/petstore.yaml b/tests/integration/data/v3.0/petstore.yaml
index 01b90f4a..fe10a175 100644
--- a/tests/integration/data/v3.0/petstore.yaml
+++ b/tests/integration/data/v3.0/petstore.yaml
@@ -83,15 +83,17 @@ paths:
                 type: object
                 required:
                   - lat
-                  - long
+                  - lon
                 properties:
                   lat:
                     type: number
-                  long:
+                  lon:
                     type: number
       responses:
         '200':
           $ref: "#/components/responses/PetsResponse"
+        '404':
+          $ref: "#/components/responses/HtmlResponse"
     post:
       summary: Create a pet
       description: Creates new pet entry
@@ -119,6 +121,13 @@ paths:
             type: integer
             format: int32
           required: true
+        - name: userdata
+          in: cookie
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/Userdata'
+          required: false
       requestBody:
         required: true
         content:
@@ -128,6 +137,7 @@ paths:
             example:
               name: "Pet"
               wings: []
+          text/plain: {}
       responses:
         '201':
           description: Null response
@@ -220,6 +230,13 @@ paths:
           $ref: "#/components/responses/ErrorResponse"
 components:
   schemas:
+    Userdata:
+      type: object
+      required:
+        - name
+      properties:
+        name:
+          type: string
     Utctime:
       oneOf:
         - type: string
@@ -406,6 +423,10 @@ components:
         application/json:
           schema:
             $ref: "#/components/schemas/ExtendedError"
+    HtmlResponse:
+      description: HTML page
+      content:
+        text/html: {}
     PetsResponse:
       description: An paged array of pets
       headers:
diff --git a/tests/integration/validation/test_petstore.py b/tests/integration/validation/test_petstore.py
index 7f2af239..486b158c 100644
--- a/tests/integration/validation/test_petstore.py
+++ b/tests/integration/validation/test_petstore.py
@@ -139,6 +139,38 @@ def test_get_pets_response(self, spec, response_validator):
         assert response_result.data.data[0].id == 1
         assert response_result.data.data[0].name == 'Cat'
 
+    def test_get_pets_response_no_schema(self, spec, response_validator):
+        host_url = 'http://petstore.swagger.io/v1'
+        path_pattern = '/v1/pets'
+        query_params = {
+            'limit': '20',
+        }
+
+        request = MockRequest(
+            host_url, 'GET', '/pets',
+            path_pattern=path_pattern, args=query_params,
+        )
+
+        parameters = validate_parameters(spec, request)
+        body = validate_body(spec, request)
+
+        assert parameters == RequestParameters(
+            query={
+                'limit': 20,
+                'page': 1,
+                'search': '',
+            }
+        )
+        assert body is None
+
+        data = '<html></html>'
+        response = MockResponse(data, status_code=404, mimetype='text/html')
+
+        response_result = response_validator.validate(request, response)
+
+        assert response_result.errors == []
+        assert response_result.data == data
+
     def test_get_pets_invalid_response(self, spec, response_validator):
         host_url = 'http://petstore.swagger.io/v1'
         path_pattern = '/v1/pets'
@@ -393,9 +425,6 @@ def test_get_pets_param_order(self, spec):
 
         assert body is None
 
-    @pytest.mark.xfail(
-        reason="No parameters deserialization support for complex scenarios"
-    )
     def test_get_pets_param_coordinates(self, spec):
         host_url = 'http://petstore.swagger.io/v1'
         path_pattern = '/v1/pets'
@@ -453,8 +482,13 @@ def test_post_birds(self, spec, spec_dict):
         headers = {
             'api_key': self.api_key_encoded,
         }
+        userdata = {
+            'name': 'user1',
+        }
+        userdata_json = json.dumps(userdata)
         cookies = {
             'user': '123',
+            'userdata': userdata_json,
         }
 
         request = MockRequest(
@@ -471,6 +505,9 @@ def test_post_birds(self, spec, spec_dict):
             },
             cookie={
                 'user': 123,
+                'userdata': {
+                    'name': 'user1',
+                },
             },
         )
 
diff --git a/tests/integration/validation/test_validators.py b/tests/integration/validation/test_validators.py
index 235341d6..3168d6f6 100644
--- a/tests/integration/validation/test_validators.py
+++ b/tests/integration/validation/test_validators.py
@@ -194,6 +194,66 @@ def test_invalid_content_type(self, validator):
             },
         )
 
+    def test_invalid_complex_parameter(self, validator, spec_dict):
+        pet_name = 'Cat'
+        pet_tag = 'cats'
+        pet_street = 'Piekna'
+        pet_city = 'Warsaw'
+        data_json = {
+            'name': pet_name,
+            'tag': pet_tag,
+            'position': 2,
+            'address': {
+                'street': pet_street,
+                'city': pet_city,
+            },
+            'ears': {
+                'healthy': True,
+            }
+        }
+        data = json.dumps(data_json)
+        headers = {
+            'api_key': self.api_key_encoded,
+        }
+        userdata = {
+            'name': 1,
+        }
+        userdata_json = json.dumps(userdata)
+        cookies = {
+            'user': '123',
+            'userdata': userdata_json,
+        }
+        request = MockRequest(
+            'https://development.gigantic-server.com', 'post', '/v1/pets',
+            path_pattern='/v1/pets', data=data,
+            headers=headers, cookies=cookies,
+        )
+
+        result = validator.validate(request)
+
+        assert len(result.errors) == 1
+        assert type(result.errors[0]) == InvalidSchemaValue
+        assert result.parameters == RequestParameters(
+            header={
+                'api_key': self.api_key,
+            },
+            cookie={
+                'user': 123,
+            },
+        )
+        assert result.security == {}
+
+        schemas = spec_dict['components']['schemas']
+        pet_model = schemas['PetCreate']['x-model']
+        address_model = schemas['Address']['x-model']
+        assert result.body.__class__.__name__ == pet_model
+        assert result.body.name == pet_name
+        assert result.body.tag == pet_tag
+        assert result.body.position == 2
+        assert result.body.address.__class__.__name__ == address_model
+        assert result.body.address.street == pet_street
+        assert result.body.address.city == pet_city
+
     def test_post_pets(self, validator, spec_dict):
         pet_name = 'Cat'
         pet_tag = 'cats'
@@ -248,6 +308,35 @@ def test_post_pets(self, validator, spec_dict):
         assert result.body.address.street == pet_street
         assert result.body.address.city == pet_city
 
+    def test_post_pets_plain_no_schema(self, validator, spec_dict):
+        data = 'plain text'
+        headers = {
+            'api_key': self.api_key_encoded,
+        }
+        cookies = {
+            'user': '123',
+        }
+        request = MockRequest(
+            'https://development.gigantic-server.com', 'post', '/v1/pets',
+            path_pattern='/v1/pets', data=data,
+            headers=headers, cookies=cookies,
+            mimetype='text/plain',
+        )
+
+        result = validator.validate(request)
+
+        assert result.errors == []
+        assert result.parameters == RequestParameters(
+            header={
+                'api_key': self.api_key,
+            },
+            cookie={
+                'user': 123,
+            },
+        )
+        assert result.security == {}
+        assert result.body == data
+
     def test_get_pet_unauthorized(self, validator):
         request = MockRequest(
             self.host_url, 'get', '/v1/pets/1',
diff --git a/tests/unit/deserializing/test_parameters_deserializers.py b/tests/unit/deserializing/test_parameters_deserializers.py
index a34cc815..06036acd 100644
--- a/tests/unit/deserializing/test_parameters_deserializers.py
+++ b/tests/unit/deserializing/test_parameters_deserializers.py
@@ -17,20 +17,6 @@ def create_deserializer(param):
             return ParameterDeserializersFactory().create(param)
         return create_deserializer
 
-    def test_deprecated(self, deserializer_factory):
-        spec = {
-            'name': 'param',
-            'in': 'query',
-            'deprecated': True,
-        }
-        param = SpecPath.from_spec(spec)
-        value = 'test'
-
-        with pytest.warns(DeprecationWarning):
-            result = deserializer_factory(param)(value)
-
-        assert result == value
-
     def test_query_empty(self, deserializer_factory):
         spec = {
             'name': 'param',