diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
index 7a6c202..ecc8746 100644
--- a/.rubocop_todo.yml
+++ b/.rubocop_todo.yml
@@ -1,6 +1,6 @@
 # This configuration was generated by
 # `rubocop --auto-gen-config`
-# on 2024-09-09 22:35:29 UTC using RuboCop version 1.66.1.
+# on 2025-05-08 20:42:22 UTC using RuboCop version 1.75.5.
 # The point is for the user to remove these configuration records
 # one by one as the offenses are removed from the code base.
 # Note that changes in the inspected code, or installation of new
@@ -44,7 +44,7 @@ Metrics/AbcSize:
 # Offense count: 2
 # Configuration parameters: CountComments, CountAsOne.
 Metrics/ClassLength:
-  Max: 112
+  Max: 117
 
 # Offense count: 2
 # Configuration parameters: AllowedMethods, AllowedPatterns.
@@ -64,7 +64,7 @@ Metrics/PerceivedComplexity:
 # Offense count: 5
 # Configuration parameters: EnforcedStyle, CheckMethodNames, CheckSymbols, AllowedIdentifiers, AllowedPatterns.
 # SupportedStyles: snake_case, normalcase, non_integer
-# AllowedIdentifiers: capture3, iso8601, rfc1123_date, rfc822, rfc2822, rfc3339, x86_64
+# AllowedIdentifiers: TLS1_1, TLS1_2, capture3, iso8601, rfc1123_date, rfc822, rfc2822, rfc3339, x86_64
 Naming/VariableNumber:
   Exclude:
     - 'spec/grape-swagger/entities/response_model_spec.rb'
@@ -100,9 +100,9 @@ RSpec/DescribeClass:
 # Offense count: 4
 # Configuration parameters: CountAsOne.
 RSpec/ExampleLength:
-  Max: 187
+  Max: 211
 
-# Offense count: 24
+# Offense count: 26
 RSpec/LeakyConstantDeclaration:
   Exclude:
     - 'spec/grape-swagger/entities/response_model_spec.rb'
@@ -118,14 +118,14 @@ RSpec/MultipleDescribes:
 RSpec/MultipleExpectations:
   Max: 11
 
-# Offense count: 20
+# Offense count: 21
 # Configuration parameters: EnforcedStyle, IgnoreSharedExamples.
 # SupportedStyles: always, named_only
 RSpec/NamedSubject:
   Exclude:
     - 'spec/grape-swagger/entities/response_model_spec.rb'
 
-# Offense count: 39
+# Offense count: 40
 # Configuration parameters: AllowedGroups.
 RSpec/NestedGroups:
   Max: 5
diff --git a/lib/grape-swagger/entity/parser.rb b/lib/grape-swagger/entity/parser.rb
index c93b426..437f633 100644
--- a/lib/grape-swagger/entity/parser.rb
+++ b/lib/grape-swagger/entity/parser.rb
@@ -135,9 +135,15 @@ def parse_nested(entity_name, entity_options, parent_model = nil)
       end
 
       def required_params(params)
-        params.select { |_, options| options.fetch(:documentation, {}).fetch(:required, false) }
-              .map { |(key, options)| [options.fetch(:as, key), options] }
-              .map(&:first)
+        params.each_with_object(Set.new) do |(key, options), accum|
+          required = if options.fetch(:documentation, {}).key?(:required)
+                       options.dig(:documentation, :required)
+                     else
+                       !options.key?(:if) && !options.key?(:unless)
+                     end
+
+          accum.add(options.fetch(:as, key)) if required
+        end.to_a
       end
 
       def with_required(hash, required)
diff --git a/spec/grape-swagger/entities/response_model_spec.rb b/spec/grape-swagger/entities/response_model_spec.rb
index 018f804..fb57f5d 100644
--- a/spec/grape-swagger/entities/response_model_spec.rb
+++ b/spec/grape-swagger/entities/response_model_spec.rb
@@ -44,7 +44,8 @@ def app
       'properties' => {
         'code' => { 'type' => 'string', 'description' => 'Error code' },
         'message' => { 'type' => 'string', 'description' => 'Error message' }
-      }
+      },
+      'required' => %w[code message]
     )
 
     expect(subject['definitions'].keys).to include 'ThisApi_Entities_Something'
@@ -66,24 +67,32 @@ def app
             'code' => { 'type' => 'string', 'description' => 'Error code' },
             'message' => { 'type' => 'string', 'description' => 'Error message' },
             'attr' => { 'type' => 'string', 'description' => 'Attribute' } },
-      'required' => ['attr']
+      'required' => %w[text colors hidden_attr created_at kind kind2 kind3 tags relation
+                       attr code message]
     )
 
     expect(subject['definitions'].keys).to include 'ThisApi_Entities_Kind'
     expect(subject['definitions']['ThisApi_Entities_Kind']).to eq(
-      'type' => 'object', 'properties' => { 'title' => { 'type' => 'string', 'description' => 'Title of the kind.' },
-                                            'content' => { 'description' => 'Content', 'type' => 'string',
-                                                           'x-some' => 'stuff' } }
+      'type' => 'object',
+      'properties' => {
+        'title' => { 'type' => 'string', 'description' => 'Title of the kind.' },
+        'content' => { 'type' => 'string', 'description' => 'Content', 'x-some' => 'stuff' }
+      },
+      'required' => %w[title content]
     )
 
     expect(subject['definitions'].keys).to include 'ThisApi_Entities_Relation'
     expect(subject['definitions']['ThisApi_Entities_Relation']).to eq(
-      'type' => 'object', 'properties' => { 'name' => { 'type' => 'string', 'description' => 'Name' } }
+      'type' => 'object',
+      'properties' => { 'name' => { 'type' => 'string', 'description' => 'Name' } },
+      'required' => %w[name]
     )
 
     expect(subject['definitions'].keys).to include 'ThisApi_Entities_Tag'
     expect(subject['definitions']['ThisApi_Entities_Tag']).to eq(
-      'type' => 'object', 'properties' => { 'name' => { 'type' => 'string', 'description' => 'Name' } }
+      'type' => 'object',
+      'properties' => { 'name' => { 'type' => 'string', 'description' => 'Name' } },
+      'required' => %w[name]
     )
   end
 end
@@ -134,8 +143,10 @@ class Nested < Grape::Entity
           end
           expose :nested_required do
             expose :some1, documentation: { required: true, desc: 'Required some 1' }
-            expose :attr, as: :some2, documentation: { required: true, desc: 'Required some 2' }
-            expose :some3, documentation: { desc: 'Optional some 3' }
+            expose :attr, as: :some2, documentation: { desc: 'Required some 2' }
+            expose :some3, documentation: { required: false, desc: 'Optional some 3' }
+            expose :some4, if: -> { true }, documentation: { desc: 'Optional some 4' }
+            expose :some5, unless: -> { true }, documentation: { desc: 'Optional some 5' }
           end
 
           expose :nested_array, documentation: { type: 'Array', desc: 'Nested array' } do
@@ -235,7 +246,8 @@ def app
         'uuid' => { 'type' => 'string', 'format' => 'own', 'description' => 'customer uuid',
                     'example' => 'e3008fba-d53d-4bcc-a6ae-adc56dff8020' },
         'color' => { 'type' => 'string', 'enum' => %w[red blue], 'description' => 'Color' }
-      }
+      },
+      'required' => %w[guid uuid color]
     )
     expect(subject['TheseApi_Entities_Kind']).to eql(
       'type' => 'object',
@@ -244,16 +256,21 @@ def app
                   'readOnly' => true },
         'title' => { 'type' => 'string', 'description' => 'Title of the kind.', 'readOnly' => false },
         'type' => { 'type' => 'string', 'description' => 'Type of the kind.', 'readOnly' => true }
-      }
+      },
+      'required' => %w[id title type]
     )
     expect(subject['TheseApi_Entities_Tag']).to eql(
-      'type' => 'object', 'properties' => { 'name' => { 'type' => 'string', 'description' => 'Name',
-                                                        'example' => 'random_tag' } }
+      'type' => 'object',
+      'properties' => { 'name' => { 'type' => 'string', 'description' => 'Name', 'example' => 'random_tag' } },
+      'required' => %w[name]
     )
     expect(subject['TheseApi_Entities_Relation']).to eql(
-      'type' => 'object', 'properties' => { 'name' => { 'type' => 'string', 'description' => 'Name' } }
+      'type' => 'object',
+      'properties' => { 'name' => { 'type' => 'string', 'description' => 'Name' } },
+      'required' => %w[name]
     )
     expect(subject['TheseApi_Entities_Nested']).to eq(
+      'type' => 'object',
       'properties' => {
         'nested' => {
           'type' => 'object',
@@ -261,13 +278,15 @@ def app
             'some1' => { 'type' => 'string', 'description' => 'Nested some 1' },
             'some2' => { 'type' => 'string', 'description' => 'Nested some 2' }
           },
-          'description' => 'Nested entity'
+          'description' => 'Nested entity',
+          'required' => %w[some1 some2]
         },
         'aliased' => {
           'type' => 'object',
           'properties' => {
             'some1' => { 'type' => 'string', 'description' => 'Alias some 1' }
-          }
+          },
+          'required' => %w[some1]
         },
         'deep_nested' => {
           'type' => 'object',
@@ -277,17 +296,21 @@ def app
               'properties' => {
                 'level_2' => { 'type' => 'string', 'description' => 'Level 2' }
               },
-              'description' => 'More deepest nested entity'
+              'description' => 'More deepest nested entity',
+              'required' => %w[level_2]
             }
           },
-          'description' => 'Deep nested entity'
+          'description' => 'Deep nested entity',
+          'required' => %w[level_1]
         },
         'nested_required' => {
           'type' => 'object',
           'properties' => {
             'some1' => { 'type' => 'string', 'description' => 'Required some 1' },
             'some2' => { 'type' => 'string', 'description' => 'Required some 2' },
-            'some3' => { 'type' => 'string', 'description' => 'Optional some 3' }
+            'some3' => { 'type' => 'string', 'description' => 'Optional some 3' },
+            'some4' => { 'type' => 'string', 'description' => 'Optional some 4' },
+            'some5' => { 'type' => 'string', 'description' => 'Optional some 5' }
           },
           'required' => %w[some1 some2]
         },
@@ -298,14 +321,16 @@ def app
             'properties' => {
               'id' => { 'type' => 'integer', 'format' => 'int32', 'description' => 'Collection element id' },
               'name' => { 'type' => 'string', 'description' => 'Collection element name' }
-            }
+            },
+            'required' => %w[id name]
           },
           'description' => 'Nested array'
         }
       },
-      'type' => 'object'
+      'required' => %w[nested aliased deep_nested nested_required nested_array]
     )
     expect(subject['TheseApi_Entities_NestedChild']).to eq(
+      'type' => 'object',
       'properties' => {
         'nested' => {
           'type' => 'object',
@@ -314,14 +339,16 @@ def app
             'some2' => { 'type' => 'string', 'description' => 'Nested some 2' },
             'some3' => { 'type' => 'string', 'description' => 'Nested some 3' }
           },
-          'description' => 'Nested entity'
+          'description' => 'Nested entity',
+          'required' => %w[some1 some2 some3]
         },
         'aliased' => {
           'type' => 'object',
           'properties' => {
             'some1' => { 'type' => 'string', 'description' => 'Alias some 1' },
             'some2' => { 'type' => 'string', 'description' => 'Alias some 2' }
-          }
+          },
+          'required' => %w[some1 some2]
         },
         'deep_nested' => {
           'type' => 'object',
@@ -337,20 +364,25 @@ def app
                       'description' => 'Level 3'
                     }
                   },
-                  'description' => 'Level 2'
+                  'description' => 'Level 2',
+                  'required' => %w[level_3]
                 }
               },
-              'description' => 'More deepest nested entity'
+              'description' => 'More deepest nested entity',
+              'required' => %w[level_2]
             }
           },
-          'description' => 'Deep nested entity'
+          'description' => 'Deep nested entity',
+          'required' => %w[level_1]
         },
         'nested_required' => {
           'type' => 'object',
           'properties' => {
             'some1' => { 'type' => 'string', 'description' => 'Required some 1' },
             'some2' => { 'type' => 'string', 'description' => 'Required some 2' },
-            'some3' => { 'type' => 'string', 'description' => 'Optional some 3' }
+            'some3' => { 'type' => 'string', 'description' => 'Optional some 3' },
+            'some4' => { 'type' => 'string', 'description' => 'Optional some 4' },
+            'some5' => { 'type' => 'string', 'description' => 'Optional some 5' }
           },
           'required' => %w[some1 some2]
         },
@@ -362,12 +394,13 @@ def app
               'id' => { 'type' => 'integer', 'format' => 'int32', 'description' => 'Collection element id' },
               'name' => { 'type' => 'string', 'description' => 'Collection element name' },
               'category' => { 'type' => 'string', 'description' => 'Collection element category' }
-            }
+            },
+            'required' => %w[id name category]
           },
           'description' => 'Nested array'
         }
       },
-      'type' => 'object'
+      'required' => %w[nested aliased deep_nested nested_required nested_array]
     )
     expect(subject['TheseApi_Entities_Polymorphic']).to eql(
       'type' => 'object',
@@ -380,6 +413,7 @@ def app
     )
 
     expect(subject['TheseApi_Entities_MixedType']).to eql(
+      'type' => 'object',
       'properties' => {
         'tags' => {
           'description' => 'Tags',
@@ -387,7 +421,7 @@ def app
           'type' => 'array'
         }
       },
-      'type' => 'object'
+      'required' => %w[tags]
     )
 
     expect(subject['TheseApi_Entities_SomeEntity']).to eql(
@@ -414,7 +448,8 @@ def app
         },
         'attr' => { 'type' => 'string', 'description' => 'Attribute' }
       },
-      'required' => %w[attr],
+      'required' => %w[text kind kind2 kind3 tags relation values nested nested_child
+                       polymorphic mixed attr code message],
       'description' => 'TheseApi_Entities_SomeEntity model'
     )
   end