diff --git a/lib/rspec_api_documentation.rb b/lib/rspec_api_documentation.rb
index a8a5ce6f..7066409b 100644
--- a/lib/rspec_api_documentation.rb
+++ b/lib/rspec_api_documentation.rb
@@ -1,6 +1,7 @@
 require 'active_support'
 require 'active_support/inflector'
 require 'active_support/core_ext/hash/conversions'
+require 'active_support/core_ext/hash/deep_merge'
 require 'cgi'
 require 'json'
 
diff --git a/lib/rspec_api_documentation/dsl/endpoint.rb b/lib/rspec_api_documentation/dsl/endpoint.rb
index 9dc91222..b30365e1 100644
--- a/lib/rspec_api_documentation/dsl/endpoint.rb
+++ b/lib/rspec_api_documentation/dsl/endpoint.rb
@@ -66,7 +66,7 @@ def params
       parameters = example.metadata.fetch(:parameters, {}).inject({}) do |hash, param|
         set_param(hash, param)
       end
-      parameters.merge!(extra_params)
+      parameters.deep_merge!(extra_params)
       parameters
     end
 
@@ -128,6 +128,7 @@ def rspec_api_documentation_client
     def extra_params
       return {} if @extra_params.nil?
       @extra_params.inject({}) do |h, (k, v)|
+        v = v.is_a?(Hash) ? v.stringify_keys : v
         h[k.to_s] = v
         h
       end
diff --git a/spec/dsl_spec.rb b/spec/dsl_spec.rb
index b1c5ffa3..2cf04ac2 100644
--- a/spec/dsl_spec.rb
+++ b/spec/dsl_spec.rb
@@ -362,6 +362,9 @@
   context "auto request" do
     post "/orders" do
       parameter :order_type, "Type of order"
+      parameter :amount, "Amount of order", scope: :order
+      parameter :name, "Name of order", scope: :order
+
 
       context "no extra params" do
         before do
@@ -382,6 +385,17 @@
 
         example_request "should take an optional parameter hash", :order_type => "big"
       end
+
+      context "extra options for do_request with scoped hash" do
+        before do
+          expect(client).to receive(:post).with("/orders", {"order_type" => "big", "order" => {"amount" => "19.99", "name" => "Friday Order"}}, nil)
+        end
+
+        let(:amount) { '19.99' }
+        let(:name) { 'Monday Order' }
+
+        example_request "should deep merge the optional parameter hash", {:order_type => 'big', :order => {:name => 'Friday Order'}}
+      end
     end
   end