diff --git a/swagger_parser/CHANGELOG.md b/swagger_parser/CHANGELOG.md
index 681932cd..ae6a390c 100644
--- a/swagger_parser/CHANGELOG.md
+++ b/swagger_parser/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 1.20.0
+- Add validation params to generated `freezed` classes
+- Fixed errors with empty schema properties([#280](https://github.com/Carapacik/swagger_parser/issues/280))
+
 ## 1.19.2
 - Fix replacement rules for OpenAPI v2([#266](https://github.com/Carapacik/swagger_parser/issues/266))
 - Add `x-nullable` field for null definition in OpenAPI v2([#268](https://github.com/Carapacik/swagger_parser/issues/268))
diff --git a/swagger_parser/README.md b/swagger_parser/README.md
index f7913eb7..4593180b 100644
--- a/swagger_parser/README.md
+++ b/swagger_parser/README.md
@@ -29,7 +29,7 @@ In your pubspec.yaml, add the following dependencies:
 
 ```yaml
 dependencies:
-  # dart_mappable: ^4.2.2 # for dart_mappable
+  # dart_mappable: ^4.3.0 # for dart_mappable
   # dio: ^5.7.0
   # freezed_annotation: ^2.4.4 # for freezed
   # json_annotation: ^4.9.0
@@ -38,10 +38,10 @@ dependencies:
 dev_dependencies:
   # build_runner: ^2.4.12
   # carapacik_lints: ^1.9.1
-  # dart_mappable_builder: ^4.2.3 # for dart_mappable
+  # dart_mappable_builder: ^4.3.0 # for dart_mappable
   # freezed: ^2.5.7 # for freezed
-  # json_serializable: ^6.8.0
-  # retrofit_generator: ^9.1.2
+  # json_serializable: ^6.9.0
+  # retrofit_generator: ^9.1.5
   swagger_parser:
 ```
 
diff --git a/swagger_parser/pubspec.yaml b/swagger_parser/pubspec.yaml
index 6e2ac8d6..e3aca081 100644
--- a/swagger_parser/pubspec.yaml
+++ b/swagger_parser/pubspec.yaml
@@ -1,6 +1,6 @@
 name: swagger_parser
 description: Package that generates REST clients and data classes from OpenApi definition file
-version: 1.19.2
+version: 1.20.0
 repository: https://github.com/Carapacik/swagger_parser/tree/main/swagger_parser
 topics:
   - swagger
diff --git a/swagger_parser/test/e2e/tests/nullable_types/expected_files/models/class_with_nullable_types.dart b/swagger_parser/test/e2e/tests/nullable_types/expected_files/models/class_with_nullable_types.dart
index 5aa7d04e..15b27f69 100644
--- a/swagger_parser/test/e2e/tests/nullable_types/expected_files/models/class_with_nullable_types.dart
+++ b/swagger_parser/test/e2e/tests/nullable_types/expected_files/models/class_with_nullable_types.dart
@@ -48,8 +48,8 @@ class ClassWithNullableTypes with _$ClassWithNullableTypes {
 
   factory ClassWithNullableTypes.fromJson(Map<String, Object?> json) =>
       _$ClassWithNullableTypesFromJson(json);
-  static const double validIntMin = 0.0;
-  static const double validIntMax = 100.0;
+  static const int validIntMin = 0;
+  static const int validIntMax = 100;
   static const int validStringMinLength = 0;
   static const int validStringMaxLength = 100;
   static const String validStringPattern = r"^[a-zA-Z0-9]*$";