diff --git a/CHANGELOG.md b/CHANGELOG.md
index bf39d7e..c4cb07e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,9 +6,12 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/) a
 ## [Unreleased]
 
 
+## [0.4.0] - 2020-02-10
+
 ### Update Dependencies
 * ring > 0.16
 * reqwest > 0.10
+* Update minimum Rust version to 1.39
 
 ## [0.3.12] - 2019-22-22
 
@@ -123,7 +126,8 @@ Initial release supports
 * delete
 * download
 
-[Unreleased]: https://github.com/lukaspustina/ceres/compare/v0.3.12...HEAD
+[Unreleased]: https://github.com/lukaspustina/ceres/compare/v0.4.0...HEAD
+[0.4.0]: https://github.com/lukaspustina/ceres/compare/v0.3.12...0.4.0
 [0.3.12]: https://github.com/lukaspustina/ceres/compare/v0.3.10...0.3.12
 [0.3.10]: https://github.com/lukaspustina/ceres/compare/v0.3.9...0.3.10
 [0.3.9]: https://github.com/lukaspustina/ceres/compare/v0.3.8...0.3.9
diff --git a/Cargo.toml b/Cargo.toml
index a9c47e7..0c1a512 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "centerdevice"
-version = "0.3.12"
+version = "0.4.0"
 authors = ["Lukas Pustina <lukas.pustina@centerdevice.de>"]
 description = "Rust API Client for CenterDevice"
 repository = "https://github.com/centerdevice/centerdevice-rs.git"