diff --git a/lib/apipie/generator/swagger/param_description/type.rb b/lib/apipie/generator/swagger/param_description/type.rb
index cbf9bde1f..f35c49b71 100644
--- a/lib/apipie/generator/swagger/param_description/type.rb
+++ b/lib/apipie/generator/swagger/param_description/type.rb
@@ -56,7 +56,7 @@ def type
 
   def for_array_type
     validator_opts = validator.param_description.options
-    items_type = validator_opts[:of].to_s || validator_opts[:array_of].to_s
+    items_type = (validator_opts[:of] || validator_opts[:array_of]).to_s
 
     if items_type == 'Hash' && params_in_body_use_reference?
       reference_name = Apipie::Generator::Swagger::OperationId.
@@ -67,7 +67,7 @@ def for_array_type
         '$ref' => reference_name
       }
     else
-      items = { type: 'string' }
+      items = { type: array_items_type(items_type).to_s }
     end
 
     enum = @param_description.options[:in]
@@ -80,6 +80,19 @@ def for_array_type
     }
   end
 
+  # @param [String] items_type
+  #
+  # @return [Apipie::Generator::Swagger::Type]
+  def array_items_type(items_type)
+    type = Apipie::Generator::Swagger::TypeExtractor::TYPES[items_type.downcase.to_sym]
+
+    if type == 'object' || type.blank?
+      Apipie::Generator::Swagger::TypeExtractor::TYPES[:string]
+    else
+      type
+    end
+  end
+
   def for_enum_type
     {
       type: 'string',
diff --git a/spec/lib/apipie/generator/swagger/param_description/type_spec.rb b/spec/lib/apipie/generator/swagger/param_description/type_spec.rb
index fd190edf7..dbbe34f04 100644
--- a/spec/lib/apipie/generator/swagger/param_description/type_spec.rb
+++ b/spec/lib/apipie/generator/swagger/param_description/type_spec.rb
@@ -115,10 +115,15 @@
           it 'returns the reference' do
             expect(subject).to eq({ '$ref' => reference })
           end
-
         end
       end
 
+      context 'of a Swagger type' do
+        let(:validator_options) { { of: Integer } }
+
+        it { is_expected.to eq({ type: 'integer' }) }
+      end
+
       describe 'enum' do
         subject { items[:enum] }