diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 103347bbb..331a0a2ee 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-    "hugr-py": "0.2.1"
+    "hugr-py": "0.3.0"
 }
diff --git a/hugr-py/CHANGELOG.md b/hugr-py/CHANGELOG.md
index 58dccf97e..597ee8fc9 100644
--- a/hugr-py/CHANGELOG.md
+++ b/hugr-py/CHANGELOG.md
@@ -1,5 +1,43 @@
 # Changelog
 
+## [0.3.0](https://github.com/CQCL/hugr/compare/hugr-py-v0.2.1...hugr-py-v0.3.0) (2024-06-18)
+
+
+### ⚠ BREAKING CHANGES
+
+* * `add_child_op`(`_with_parent`), etc., gone; use `add_child_node`(`_with_parent`) with an (impl Into-)OpType.
+    * `get_nodetype` gone - use `get_optype`.
+    * `NodeType` gone - use `OpType` directly. 
+    * Various (Into<)Option<ExtensionSet> params removed from builder
+    methods especially {cfg_,dfg_}builder.
+    * `input_extensions` removed from serialization schema.
+* the Signature class is gone, but it's not clear how or why you might have been using it...
+* TailLoop node and associated builder functions now require specifying an ExtensionSet; extension/validate.rs deleted; some changes to Hugrs validated/rejected when the `extension_inference` feature flag is turned on
+* Type::validate takes extra bool (allow_rowvars); renamed {FunctionType, PolyFuncType}::(validate=>validate_var_len).
+
+### Features
+
+* Allow "Row Variables" declared as List&lt;Type&gt; ([#804](https://github.com/CQCL/hugr/issues/804)) ([3ea4834](https://github.com/CQCL/hugr/commit/3ea4834dd00466e3c106917c1e09c0c5b74c5826))
+* **hugr-py:** automatically add state order edges for inter-graph edges ([#1165](https://github.com/CQCL/hugr/issues/1165)) ([5da06e1](https://github.com/CQCL/hugr/commit/5da06e10581cbfed583bd466b27706241341ff14))
+* **hugr-py:** builder ops separate from serialised ops ([#1140](https://github.com/CQCL/hugr/issues/1140)) ([342eda3](https://github.com/CQCL/hugr/commit/342eda34c1f3b4ea4423268e935af44af07c976f))
+* **hugr-py:** CFG builder ([#1192](https://github.com/CQCL/hugr/issues/1192)) ([c5ea47f](https://github.com/CQCL/hugr/commit/c5ea47fd77cfbdda5f32d651618ed69b97740e2e)), closes [#1188](https://github.com/CQCL/hugr/issues/1188)
+* **hugr-py:** define type hierarchy separate from serialized ([#1176](https://github.com/CQCL/hugr/issues/1176)) ([10f4c42](https://github.com/CQCL/hugr/commit/10f4c42cfe051381e50e6387af603253e941215b))
+* **hugr-py:** python hugr builder ([#1098](https://github.com/CQCL/hugr/issues/1098)) ([23408b5](https://github.com/CQCL/hugr/commit/23408b5bbb9666002a58bf88a2a33cca0a484b30))
+* **hugr-py:** store children in node weight ([#1160](https://github.com/CQCL/hugr/issues/1160)) ([1cdaeed](https://github.com/CQCL/hugr/commit/1cdaeedde805fe3a9fd7c466ab9f2b34ac2d75c7)), closes [#1159](https://github.com/CQCL/hugr/issues/1159)
+* **hugr-py:** ToNode interface to treat builders as nodes ([#1193](https://github.com/CQCL/hugr/issues/1193)) ([1da33e6](https://github.com/CQCL/hugr/commit/1da33e654df4a122c0af57e1c6db0ada7ca066df))
+* Validate Extensions using hierarchy, ignore input_extensions, RIP inference ([#1142](https://github.com/CQCL/hugr/issues/1142)) ([8bec8e9](https://github.com/CQCL/hugr/commit/8bec8e93bcaa8917b00098837269da60e3312d6c))
+
+
+### Bug Fixes
+
+* **py:** get rid of pydantic config deprecation warnings ([#1084](https://github.com/CQCL/hugr/issues/1084)) ([52fcb9d](https://github.com/CQCL/hugr/commit/52fcb9dc88e95e9660fc291181a37dc9d1802a3d))
+
+
+### Code Refactoring
+
+* Remove "Signature" from hugr-py ([#1186](https://github.com/CQCL/hugr/issues/1186)) ([65718f7](https://github.com/CQCL/hugr/commit/65718f7dbe70397eab7ab856965566f11b9322a5))
+* Remove NodeType and input_extensions ([#1183](https://github.com/CQCL/hugr/issues/1183)) ([ea5213d](https://github.com/CQCL/hugr/commit/ea5213d4b3a42a86c637d709c48cad007eae1f9e))
+
 ## [0.2.1](https://github.com/CQCL/hugr/compare/hugr-py-v0.2.0...hugr-py-v0.2.1) (2024-05-20)
 
 ### ⚠ BREAKING CHANGES
diff --git a/hugr-py/pyproject.toml b/hugr-py/pyproject.toml
index 0c55a9476..3d0f5c103 100644
--- a/hugr-py/pyproject.toml
+++ b/hugr-py/pyproject.toml
@@ -13,7 +13,7 @@ classifiers = [
     "Topic :: Scientific/Engineering",
 ]
 name = "hugr"
-version = "0.2.1"
+version = "0.3.0"
 description = "Quantinuum's common representation for quantum programs"
 #keywords = []
 authors = ["TKET development team <tket-support@cambridgequantum.com>"]
diff --git a/hugr-py/src/hugr/__init__.py b/hugr-py/src/hugr/__init__.py
index 7b63396f5..be107b627 100644
--- a/hugr-py/src/hugr/__init__.py
+++ b/hugr-py/src/hugr/__init__.py
@@ -4,7 +4,7 @@
 
 # This is updated by our release-please workflow, triggered by this
 # annotation: x-release-please-version
-__version__ = "0.2.1"
+__version__ = "0.3.0"
 
 
 def it_works() -> str: