diff --git a/lib/apipie/generator/swagger/param_description/builder.rb b/lib/apipie/generator/swagger/param_description/builder.rb
index 03978f8b..4e3bb7e6 100644
--- a/lib/apipie/generator/swagger/param_description/builder.rb
+++ b/lib/apipie/generator/swagger/param_description/builder.rb
@@ -79,7 +79,7 @@ def for_default
   end
 
   def required?
-    required_from_path? || (!@in_schema && @param_description.required)
+    required_from_path? || @param_description.required
   end
 
   def required_from_path?
diff --git a/spec/lib/apipie/generator/swagger/method_description/response_schema_service_spec.rb b/spec/lib/apipie/generator/swagger/method_description/response_schema_service_spec.rb
index 9d5c35c6..d6c86174 100644
--- a/spec/lib/apipie/generator/swagger/method_description/response_schema_service_spec.rb
+++ b/spec/lib/apipie/generator/swagger/method_description/response_schema_service_spec.rb
@@ -56,7 +56,7 @@
         expect(properties).to eq(
           {
             a_number: {
-              type: 'number'
+              type: 'number', required: true
             },
             an_optional_number: {
               type: 'number'
@@ -72,7 +72,7 @@
           expect(properties).to eq(
             {
               a_number: {
-                type: %w[number null]
+                type: %w[number null], required: true
               },
               an_optional_number: {
                 type: %w[number null]
diff --git a/spec/lib/apipie/generator/swagger/param_description/builder_spec.rb b/spec/lib/apipie/generator/swagger/param_description/builder_spec.rb
index 9a97b9ab..24efae60 100644
--- a/spec/lib/apipie/generator/swagger/param_description/builder_spec.rb
+++ b/spec/lib/apipie/generator/swagger/param_description/builder_spec.rb
@@ -78,6 +78,12 @@
 
     it { is_expected.to be_blank }
 
+    context 'when is required' do
+      let(:base_param_description_options) { { required: true } }
+
+      it { is_expected.to eq(true) }
+    end
+
     context 'when in_schema is false' do
       let(:in_schema) { false }
 
@@ -107,6 +113,14 @@
         end
       end
     end
+
+    context 'when is required' do
+      let(:base_param_description_options) { { required: true } }
+
+      it 'does not output an option without default warning' do
+        expect { subject }.not_to output(/is optional but default value is not specified/).to_stderr
+      end
+    end
   end
 
   describe '.with_type' do
diff --git a/spec/lib/apipie/swagger_generator_spec.rb b/spec/lib/apipie/swagger_generator_spec.rb
index 2df36a06..f0adb9b9 100644
--- a/spec/lib/apipie/swagger_generator_spec.rb
+++ b/spec/lib/apipie/swagger_generator_spec.rb
@@ -61,7 +61,7 @@
           expect(properties).to eq(
             {
               a_number: {
-                type: 'number'
+                type: 'number', required: true
               },
               an_optional_number: {
                 type: 'number'
diff --git a/spec/lib/swagger/openapi_2_0_schema.json b/spec/lib/swagger/openapi_2_0_schema.json
index ebe10ed3..3d989473 100644
--- a/spec/lib/swagger/openapi_2_0_schema.json
+++ b/spec/lib/swagger/openapi_2_0_schema.json
@@ -996,7 +996,14 @@
           "$ref": "http://json-schema.org/draft-04/schema#/definitions/positiveIntegerDefault0"
         },
         "required": {
-          "$ref": "http://json-schema.org/draft-04/schema#/definitions/stringArray"
+          "anyOf": [
+            {
+              "$ref": "http://json-schema.org/draft-04/schema#/definitions/stringArray"
+            },
+            {
+              "type": "boolean"
+            }
+          ]
         },
         "enum": {
           "$ref": "http://json-schema.org/draft-04/schema#/properties/enum"