diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9aaa9d0..c41bdc9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,22 @@
 # Changelog
 
+## v2.0.0 (2022-03-08)
+
+### :boom: Breaking Changes
+  -  Global refactoring. (Issues: [`#72`](https://github.com/mom1/api-client-pydantic/issues/72))
+
+    - support for more use cases (fix #72).
+    - `serialize_response` and `serialize_request` and `serialize` call signature changed.
+    - `serialize_response` and `serialize_request` names are left for compatibility,
+       it is better to use `params_serializer` and `response_serializer` instead.
+    - Removed unnecessary dependencies.
+    - Tests completely rewritten.
+    - Decorating will only be done if necessary, which will positively affect performance.
+    
+
+### :arrow_up: Dependencies
+  -  Bump pycln from 1.2.0 to 1.2.4
+
 # [v1.2.2](https://github.com/mom1/api-client-pydantic/compare/1.2.1...1.2.2) (2022-02-24)
 
 ## :arrow_up: Dependencies
diff --git a/pyproject.toml b/pyproject.toml
index 038d8db..6849e08 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "api-client-pydantic"
-version = "1.2.2"
+version = "2.0.0"
 description = "API Client extension for validate and transform requests / responses using pydantic."
 authors = ["MaxST <mstolpasov@gmail.com>"]
 license = "MIT"