diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 10f30916..6b7b74c5 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "0.2.0"
+  ".": "0.3.0"
 }
\ No newline at end of file
diff --git a/CHANGELOG.md b/CHANGELOG.md
index d6ff28fd..f4d9a70c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,29 @@
 # Changelog
 
+## [0.3.0](https://github.com/CQCL/guppylang/compare/v0.2.0...v0.3.0) (2024-05-22)
+
+
+### Features
+
+* Add a unified definition system ([#179](https://github.com/CQCL/guppylang/issues/179)) ([ae71932](https://github.com/CQCL/guppylang/commit/ae71932a608ed5034c060972eb70265ae2dec88c))
+* Add struct types ([#207](https://github.com/CQCL/guppylang/issues/207)) ([f7adb85](https://github.com/CQCL/guppylang/commit/f7adb85bfbc7498047471cdf6b232c6b5056e19e))
+* Allow calling a tensor of functions ([#196](https://github.com/CQCL/guppylang/issues/196)) ([af4fb07](https://github.com/CQCL/guppylang/commit/af4fb07e4613c8ab5948a681ba336f1f49a49495))
+* Upgrade Hugr and start using the shared Pydantic model ([#201](https://github.com/CQCL/guppylang/issues/201)) ([bd7e67a](https://github.com/CQCL/guppylang/commit/bd7e67a59df3c6a8eede15c8a62f4f555d539c9a))
+
+
+### Bug Fixes
+
+* Consider type when deciding whether to pack up returns ([#212](https://github.com/CQCL/guppylang/issues/212)) ([4f24a07](https://github.com/CQCL/guppylang/commit/4f24a071d3c0b475920141fc5847474f0621b703))
+* Mypy tket2 error ([#220](https://github.com/CQCL/guppylang/issues/220)) ([7ad3908](https://github.com/CQCL/guppylang/commit/7ad3908e2bb2672028df3eaa2cd78883020e144f))
+* Only use path when determining equality of implicit modules ([#216](https://github.com/CQCL/guppylang/issues/216)) ([6f47d4b](https://github.com/CQCL/guppylang/commit/6f47d4bce55115c6b82d86007f75f40d46796b24))
+* Serialisation of float values ([#219](https://github.com/CQCL/guppylang/issues/219)) ([937260a](https://github.com/CQCL/guppylang/commit/937260af694fbbd5bd217f23d20f13ee4759757c)), closes [#218](https://github.com/CQCL/guppylang/issues/218)
+
+
+### Documentation
+
+* Add compiler API docs ([#194](https://github.com/CQCL/guppylang/issues/194)) ([c3dd9bd](https://github.com/CQCL/guppylang/commit/c3dd9bdf19cbfeb23b792376f2fedf8f4f4dbeaf))
+* Add pypi and python version badges to the README ([#192](https://github.com/CQCL/guppylang/issues/192)) ([7fecc45](https://github.com/CQCL/guppylang/commit/7fecc45f3fce8489872dbe65c6012f7cd0b8dc61))
+
 ## 0.2.0 (2024-04-11)
 
 
diff --git a/pyproject.toml b/pyproject.toml
index a0b7b67f..988a8dcf 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "guppylang"
-version = "0.2.0"
+version = "0.3.0"
 description = "Pythonic quantum-classical programming language"
 authors = ["Mark Koch <mark.koch@quantinuum.com>"]
 license = "Apache-2.0"