diff --git a/CHANGELOG.md b/CHANGELOG.md
index a04d526..309813a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,8 @@
 
 ## [Unreleased](https://github.com/GIScience/ohsome-py/compare/v0.3.3..master)
 
+## [0.4.0](https://github.com/GIScience/ohsome-py/releases/tag/v0.4.0)
+
 ### Changed
 
 - updated `numpy` and `geopandas` dependency to the latest major versions
diff --git a/pyproject.toml b/pyproject.toml
index e22acdc..d43f859 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "ohsome"
-version = "0.3.3"
+version = "0.4.0"
 description = "A Python client for the ohsome API"
 authors = ["HeiGIT ohsome team <ohsome@heigit.org>", "GIScience Research Group, Heidelberg University"]
 repository = "https://github.com/GIScience/ohsome-py"