diff --git a/CHANGELOG b/CHANGELOG
new file mode 100644
index 0000000..0a94e5e
--- /dev/null
+++ b/CHANGELOG
@@ -0,0 +1,5 @@
+## 0.4.0
+
+IMPROVEMENTS:
+
+ * Added support for mac address additions (optional) to emitters: https://github.com/myoung34/tilty/pull/17
diff --git a/pyproject.toml b/pyproject.toml
index 40c8dca..1158a0b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "Tilty"
-version = "0.3.4"
+version = "0.4.0"
 description = "A pluggable system to receive and transmit bluetooth events from the Tilt Hydrometer"
 authors = ["Marcus Young <3vilpenguin@gmail.com>"]
 license = "MIT"
diff --git a/setup.py b/setup.py
index 46f428a..1f4e5ad 100644
--- a/setup.py
+++ b/setup.py
@@ -13,7 +13,7 @@
     long_description=long_description,
     long_description_content_type="text/markdown",
     py_modules=['tilty', 'blescan'],
-    version='0.3.4',
+    version='0.4.0',
     packages=find_packages(exclude=['tests*']),
     install_requires=[
         'Click',