diff --git a/docs/source/conf.py b/docs/source/conf.py
index c1a2e63..7280827 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -13,7 +13,7 @@
 project = 'sts1-sensors'
 copyright = '2024, Simon Köfinger, Florian Rohrer'
 author = 'Simon Köfinger, Florian Rohrer'
-release = 'v0.3.5'
+release = 'v0.4.0'
 
 # -- General configuration ---------------------------------------------------
 # https://www.sphinx-doc.org/en/master/usage/configuration.html#general-configuration
diff --git a/pyproject.toml b/pyproject.toml
index 89c76dc..c30c5cb 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "sts1_sensors"
-version = "0.3.5"
+version = "0.4.0"
 description = "A sensor library for the CubeSat STS1 (TU Wien Space Team)."
 readme = "README.md"
 requires-python = ">=3.11,<3.12"