diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
index f1eabc45..e3de2c94 100644
--- a/.rubocop_todo.yml
+++ b/.rubocop_todo.yml
@@ -7,12 +7,12 @@
 
 # Offense count: 9
 Metrics/AbcSize:
-  Max: 346
+  Max: 347
 
 # Offense count: 1
 # Configuration parameters: CountComments.
 Metrics/ClassLength:
-  Max: 466
+  Max: 485
 
 # Offense count: 6
 Metrics/CyclomaticComplexity:
@@ -26,7 +26,7 @@ Metrics/LineLength:
 # Offense count: 17
 # Configuration parameters: CountComments.
 Metrics/MethodLength:
-  Max: 367
+  Max: 368
 
 # Offense count: 5
 Metrics/PerceivedComplexity:
diff --git a/CHANGELOG.md b/CHANGELOG.md
index c8d6587d..f576abe8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,6 +11,7 @@
 
 #### Fixes
 
+* [#221](https://github.com/tim-vandecasteele/grape-swagger/pull/221): Fixed group parameters' name with type Array - [@u2](https://github.com/u2).
 * [#211](https://github.com/tim-vandecasteele/grape-swagger/pull/211): Fixed the dependency, just `require 'grape'` - [@u2](https://github.com/u2).
 * [#210](https://github.com/tim-vandecasteele/grape-swagger/pull/210): Fixed the range `:values` option, now exposed as `enum` parameters - [@u2](https://github.com/u2).
 * [#208](https://github.com/tim-vandecasteele/grape-swagger/pull/208): Fixed `Float` parameters, exposed as Swagger `float` types - [@u2](https://github.com/u2).
diff --git a/lib/grape-swagger.rb b/lib/grape-swagger.rb
index 3cafd832..004aadb2 100644
--- a/lib/grape-swagger.rb
+++ b/lib/grape-swagger.rb
@@ -139,6 +139,25 @@ def get_non_nested_params(params)
         end
       end
 
+      def parse_array_params(params)
+        modified_params = {}
+        array_param = nil
+        params.each_key do |k|
+          if params[k].is_a?(Hash) && params[k][:type] == 'Array'
+            array_param = k
+          else
+            new_key = k
+            unless array_param.nil?
+              if k.to_s.start_with?(array_param.to_s + '[')
+                new_key = array_param.to_s + '[]' + k.to_s.split(array_param)[1]
+              end
+            end
+            modified_params[new_key] = params[k]
+          end
+        end
+        modified_params
+      end
+
       def create_documentation_class
         Class.new(Grape::API) do
           class << self
@@ -153,7 +172,9 @@ def as_markdown(description)
             def parse_params(params, path, method)
               params ||= []
 
-              non_nested_parent_params = get_non_nested_params(params)
+              parsed_array_params = parse_array_params(params)
+
+              non_nested_parent_params = get_non_nested_params(parsed_array_params)
 
               non_nested_parent_params.map do |param, value|
                 items = {}
diff --git a/spec/array_params_spec.rb b/spec/array_params_spec.rb
new file mode 100644
index 00000000..071ba557
--- /dev/null
+++ b/spec/array_params_spec.rb
@@ -0,0 +1,34 @@
+require 'spec_helper'
+
+describe 'Array Params' do
+  def app
+    Class.new(Grape::API) do
+      format :json
+
+      params do
+        requires :a_array, type: Array do
+          requires :param_1, type: Integer
+          requires :param_2, type: String
+        end
+      end
+      post :splines do
+      end
+
+      add_swagger_documentation
+    end
+  end
+
+  subject do
+    get '/swagger_doc/splines'
+    expect(last_response.status).to eq 200
+    body = JSON.parse last_response.body
+    body['apis'].first['operations'].first['parameters']
+  end
+
+  it 'gets array types' do
+    expect(subject).to eq [
+      { 'paramType' => 'form', 'name' => 'a_array[][param_1]', 'description' => nil, 'type' => 'integer', 'required' => true, 'allowMultiple' => false, 'format' => 'int32' },
+      { 'paramType' => 'form', 'name' => 'a_array[][param_2]', 'description' => nil, 'type' => 'string', 'required' => true, 'allowMultiple' => false }
+    ]
+  end
+end
diff --git a/spec/float_api_spec.rb b/spec/float_api_spec.rb
index 6f69fe28..adc9cd28 100644
--- a/spec/float_api_spec.rb
+++ b/spec/float_api_spec.rb
@@ -6,7 +6,7 @@ def app
       format :json
 
       params do
-        requires :a_float, type: Virtus::Attribute::Float
+        requires :a_float, type: Float
       end
       post :splines do
       end
diff --git a/spec/mutually_exclusive_spec.rb b/spec/mutually_exclusive_spec.rb
index 5582bd57..faccc342 100644
--- a/spec/mutually_exclusive_spec.rb
+++ b/spec/mutually_exclusive_spec.rb
@@ -31,6 +31,6 @@ def app
     parameters = body['apis'].first['operations'].first['parameters']
     expect(parameters).to eq [
       { 'paramType' => 'form', 'name' => 'required_group[param_group_1][param_1]', 'description' => nil, 'type' => 'string', 'required' => false, 'allowMultiple' => false },
-      { 'paramType' => 'form', 'name' => 'required_group[param_group_2][param_2]', 'description' => nil, 'type' => 'string', 'required' => false, 'allowMultiple' => false }]
+      { 'paramType' => 'form', 'name' => 'required_group[param_group_2][][param_2]', 'description' => nil, 'type' => 'string', 'required' => true, 'allowMultiple' => false }]
   end
 end
diff --git a/spec/range_values_spec.rb b/spec/range_values_spec.rb
index 6f07490d..1e9264b3 100644
--- a/spec/range_values_spec.rb
+++ b/spec/range_values_spec.rb
@@ -6,13 +6,13 @@ def app
       format :json
 
       params do
-        requires :letter, type: Virtus::Attribute::String, values: 'a'..'z'
+        requires :letter, type: String, values: 'a'..'z'
       end
       post :letter do
       end
 
       params do
-        requires :number, type: Virtus::Attribute::Integer, values: -5..5
+        requires :number, type: Integer, values: -5..5
       end
       post :integer do
       end