diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7ceabfe..04d4613 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,7 @@
 #### Fixes
 
 * Your contribution here.
+* [#82](https://github.com/ruby-grape/grape-swagger-entity/pull/82): Fix: simplify primitive types recognition - [@numbata](https://github.com/numbata).
 
 ### 0.6.1 (2025/05/06)
 
diff --git a/lib/grape-swagger/entity/attribute_parser.rb b/lib/grape-swagger/entity/attribute_parser.rb
index b847786..9da9e3c 100644
--- a/lib/grape-swagger/entity/attribute_parser.rb
+++ b/lib/grape-swagger/entity/attribute_parser.rb
@@ -5,9 +5,6 @@ module Entity
     class AttributeParser
       attr_reader :endpoint
 
-      # The list of that doesn't handled by `GrapeSwagger::DocMethods::DataType.primitive?` method
-      ADDITIONAL_PRIMITIVE_TYPES = %w[string array].freeze
-
       def initialize(endpoint)
         @endpoint = endpoint
       end
@@ -61,8 +58,7 @@ def ambiguous_model_type?(type)
 
       def primitive_type?(type)
         data_type = GrapeSwagger::DocMethods::DataType.call(type)
-        GrapeSwagger::DocMethods::DataType.primitive?(data_type) ||
-          ADDITIONAL_PRIMITIVE_TYPES.include?(data_type)
+        GrapeSwagger::DocMethods::DataType.request_primitive?(data_type)
       end
 
       def data_type_from(entity_options)
diff --git a/spec/grape-swagger/entity/attribute_parser_spec.rb b/spec/grape-swagger/entity/attribute_parser_spec.rb
index c5686fe..71ada22 100644
--- a/spec/grape-swagger/entity/attribute_parser_spec.rb
+++ b/spec/grape-swagger/entity/attribute_parser_spec.rb
@@ -262,6 +262,24 @@ def self.to_s
         it { is_expected.not_to include('$ref') }
       end
 
+      context 'when it is exposed as a Boolean class' do
+        let(:entity_options) do
+          { documentation: { type: Grape::API::Boolean, example: example_value, default: example_value } }
+        end
+
+        context 'when the example value is true' do
+          let(:example_value) { true }
+
+          it { is_expected.to include(type: 'boolean', example: example_value, default: example_value) }
+        end
+
+        context 'when the example value is false' do
+          let(:example_value) { false }
+
+          it { is_expected.to include(type: 'boolean', example: example_value, default: example_value) }
+        end
+      end
+
       context 'when it is exposed as a boolean' do
         let(:entity_options) { { documentation: { type: 'boolean', example: example_value, default: example_value } } }
 
@@ -277,6 +295,22 @@ def self.to_s
           it { is_expected.to include(type: 'boolean', example: example_value, default: example_value) }
         end
       end
+
+      context 'when it is exposed as a hash' do
+        let(:entity_options) { { documentation: { type: Hash, example: example_value, default: example_value } } }
+
+        context 'when the example value is true' do
+          let(:example_value) { true }
+
+          it { is_expected.to include(type: 'object', example: example_value, default: example_value) }
+        end
+
+        context 'when the example value is false' do
+          let(:example_value) { false }
+
+          it { is_expected.to include(type: 'object', example: example_value, default: example_value) }
+        end
+      end
     end
   end
 end