diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index f1c1e588..210d2903 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "0.5.0"
+  ".": "0.5.1"
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 97fa709f..2394fc5e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## [0.5.1](https://github.com/CQCL/guppylang/compare/v0.5.0...v0.5.1) (2024-06-12)
+
+
+### Bug Fixes
+
+* Serialisation of bool values ([#239](https://github.com/CQCL/guppylang/issues/239)) ([16a77db](https://github.com/CQCL/guppylang/commit/16a77dbd4c5905eff6c4ddabe66b5ef1b8a7e15b))
+
 ## [0.5.0](https://github.com/CQCL/guppylang/compare/v0.4.0...v0.5.0) (2024-06-10)
 
 
diff --git a/pyproject.toml b/pyproject.toml
index 8ae27814..9da791f6 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "guppylang"
-version = "0.5.0"
+version = "0.5.1"
 description = "Pythonic quantum-classical programming language"
 authors = ["Mark Koch <mark.koch@quantinuum.com>"]
 license = "Apache-2.0"