diff --git a/lib/openapi_parser.rb b/lib/openapi_parser.rb
index 011d46a..92a161b 100644
--- a/lib/openapi_parser.rb
+++ b/lib/openapi_parser.rb
@@ -82,13 +82,13 @@ def parse_file(content, ext)
 
       def parse_yaml(content)
         # FIXME: when drop ruby 2.5, we should use permitted_classes
-        (Gem::Version.create(RUBY_VERSION) < Gem::Version.create("2.6.0")) ? 
-          Psych.safe_load(content, [Date, Time]) : 
+        (Gem::Version.create(RUBY_VERSION) < Gem::Version.create("2.6.0")) ?
+          Psych.safe_load(content, [Date, Time]) :
           Psych.safe_load(content, permitted_classes: [Date, Time])
       end
 
       def parse_json(content)
-        raise "json content is nil" unless content 
+        raise "json content is nil" unless content
         JSON.parse(content)
       end
 
diff --git a/lib/openapi_parser/config.rb b/lib/openapi_parser/config.rb
index faf6008..c8cf490 100644
--- a/lib/openapi_parser/config.rb
+++ b/lib/openapi_parser/config.rb
@@ -37,11 +37,17 @@ def validate_header
     @config.fetch(:validate_header, true)
   end
 
+  # TODO: in a major version update, change this to default to `ignore`.
+  def handle_readOnly
+    @config.fetch(:handle_readOnly, nil)
+  end
+
   # @return [OpenAPIParser::SchemaValidator::Options]
   def request_validator_options
     @request_validator_options ||= OpenAPIParser::SchemaValidator::Options.new(coerce_value: coerce_value,
                                                                                datetime_coerce_class: datetime_coerce_class,
-                                                                               validate_header: validate_header)
+                                                                               validate_header: validate_header,
+                                                                               handle_readOnly: handle_readOnly)
   end
 
   alias_method :request_body_options, :request_validator_options
diff --git a/lib/openapi_parser/schema_validator.rb b/lib/openapi_parser/schema_validator.rb
index fd9d2af..aa5c1af 100644
--- a/lib/openapi_parser/schema_validator.rb
+++ b/lib/openapi_parser/schema_validator.rb
@@ -54,6 +54,7 @@ def initialize(value, schema, options)
     @schema = schema
     @coerce_value = options.coerce_value
     @datetime_coerce_class = options.datetime_coerce_class
+    @handle_readOnly = options.handle_readOnly
   end
 
   # execute validate data
@@ -135,7 +136,7 @@ def boolean_validator
     end
 
     def object_validator
-      @object_validator ||= OpenAPIParser::SchemaValidator::ObjectValidator.new(self, @coerce_value)
+      @object_validator ||= OpenAPIParser::SchemaValidator::ObjectValidator.new(self, @coerce_value, @handle_readOnly)
     end
 
     def array_validator
diff --git a/lib/openapi_parser/schema_validator/object_validator.rb b/lib/openapi_parser/schema_validator/object_validator.rb
index 1ee355e..1e3be21 100644
--- a/lib/openapi_parser/schema_validator/object_validator.rb
+++ b/lib/openapi_parser/schema_validator/object_validator.rb
@@ -1,5 +1,10 @@
 class OpenAPIParser::SchemaValidator
   class ObjectValidator < Base
+
+    def initialize(validator, coerce_value, handle_readOnly)
+      super(validator, coerce_value)
+      @handle_readOnly = handle_readOnly
+    end
     # @param [Hash] value
     # @param [OpenAPIParser::Schemas::Schema] schema
     # @param [Boolean] parent_all_of true if component is nested under allOf
@@ -10,6 +15,15 @@ def coerce_and_validate(value, schema, parent_all_of: false, parent_discriminato
       properties = schema.properties || {}
 
       required_set = schema.required ? schema.required.to_set : Set.new
+
+      if @handle_readOnly == :ignore
+        schema.properties.each do |name, property_value|
+          next unless property_value.read_only
+          required_set.delete(name)
+          value.delete(name)
+        end
+      end
+
       remaining_keys = value.keys
 
       if schema.discriminator && !parent_discriminator_schemas.include?(schema)
diff --git a/lib/openapi_parser/schema_validator/options.rb b/lib/openapi_parser/schema_validator/options.rb
index 6824f03..0d24aea 100644
--- a/lib/openapi_parser/schema_validator/options.rb
+++ b/lib/openapi_parser/schema_validator/options.rb
@@ -6,12 +6,15 @@ class Options
     #   @return [Object, nil] coerce datetime string by this Object class
     # @!attribute [r] validate_header
     #   @return [Boolean] validate header or not
-    attr_reader :coerce_value, :datetime_coerce_class, :validate_header
+    # @!attribute [r] handle_readOnly
+    #   @return [Object, nil] How to use readOnly property to process requests. Either :ignore or :raise
+    attr_reader :coerce_value, :datetime_coerce_class, :validate_header, :handle_readOnly
 
-    def initialize(coerce_value: nil, datetime_coerce_class: nil, validate_header: true)
+    def initialize(coerce_value: nil, datetime_coerce_class: nil, validate_header: true, handle_readOnly: nil)
       @coerce_value = coerce_value
       @datetime_coerce_class = datetime_coerce_class
       @validate_header = validate_header
+      @handle_readOnly = handle_readOnly
     end
   end