diff --git a/CHANGELOG.md b/CHANGELOG.md
index c2ff79c..0dde129 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,16 @@
 # Changelog
 
+## 0.3.1
+
+### Changed
+
+ - relaxed dependency requirement for `urllib3` to >=2.0.2
+
+### Fixed
+
+ - prevent an exception if the `log_dir` for the `OhsomeClient` was set to `None`
+ - improved and sped up testing (first steps towards [#139](https://github.com/GIScience/ohsome-py/issues/139))
+
 ## 0.3.0
 
 ### Added
diff --git a/pyproject.toml b/pyproject.toml
index a68a8d3..00423c9 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "ohsome"
-version = "0.3.0"
+version = "0.3.1"
 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"