diff --git a/CHANGELOG.md b/CHANGELOG.md
index de66a3437..649055c80 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,7 +4,10 @@ We follow Semantic Versions since the `0.1.0` release.
 We used to have incremental versioning before `0.1.0`.
 
 
-## WIP
+## 0.4.0
+
+Development was focused around better test coverage and providing a better API
+for tests. We also now covering more cases and testing violation texts.
 
 ### Features
 
diff --git a/pyproject.toml b/pyproject.toml
index 733874a7a..52695f1bc 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "wemake-python-styleguide"
-version = "0.3.0"
+version = "0.4.0"
 description = "The strictest and most opinionated python linter ever"
 
 license = "MIT"