diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2017e0c..91cccc8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## 0.4.0
+
+- Add support to Dyson Pure Cool
+- Add device type names dictionary
+- Add more states to VacuumState
+- Code quality improvement
+
 ## 0.3.3
 
 - Fix wheel building to include certificate
diff --git a/setup.cfg b/setup.cfg
index 6582894..53205e0 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,6 +1,6 @@
 [metadata]
 name = libdyson
-version = 0.3.3
+version = 0.4.0
 author = Xiaonan Shen
 author_email = s@sxn.dev
 license = MIT License