diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8f710657f..875e6058f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.5.1] - 2023-11-23
+- Python only: Release the changes introduced in `feos-core` 0.5.1.
+
 ## [0.5.0] - 2023-10-20
 ### Added
 - Added `IdealGasModel` enum that collects all implementors of the `IdealGas` trait. [#158](https://github.com/feos-org/feos/pull/158)
diff --git a/Cargo.toml b/Cargo.toml
index f0eaf23d9..0e389de5a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "feos"
-version = "0.5.0"
+version = "0.5.1"
 authors = ["Gernot Bauer <bauer@itt.uni-stuttgart.de>", "Philipp Rehner <prehner@ethz.ch>"]
 edition = "2021"
 readme = "README.md"
diff --git a/feos-core/CHANGELOG.md b/feos-core/CHANGELOG.md
index 8923724c2..a987dc6c2 100644
--- a/feos-core/CHANGELOG.md
+++ b/feos-core/CHANGELOG.md
@@ -5,6 +5,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## Unreleased
+
+## [0.5.1] - 2023-11-23
 ### Fixed
 - Aligned how binary segment records are treated in Rust and Python. [#200](https://github.com/feos-org/feos/pull/200)
 
diff --git a/feos-core/Cargo.toml b/feos-core/Cargo.toml
index d843724a0..ef32d19a8 100644
--- a/feos-core/Cargo.toml
+++ b/feos-core/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "feos-core"
-version = "0.5.0"
+version = "0.5.1"
 authors = ["Gernot Bauer <bauer@itt.uni-stuttgart.de>",
            "Philipp Rehner <prehner@ethz.ch"]
 edition = "2021"