diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4d2e808..8d9e5ac 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## 0.4.0
+
+- add virtual inputs operations
+- add virtual output operations
+- refactor relay/switch code
+- test and support python 3.9
+
 ## 0.3.0
 
 - add read operation on analog sensors
diff --git a/ipx800/__init__.py b/ipx800/__init__.py
index 61749db..fd2cab1 100644
--- a/ipx800/__init__.py
+++ b/ipx800/__init__.py
@@ -5,4 +5,4 @@
 from ipx800.ipx800 import ApiError, IPX800 as ipx800  # noqa
 
 
-__version__ = "0.3.0"
+__version__ = "0.4.0"