diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index c939732bf..8d1c522f3 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-    "hugr-py": "0.0.0"
+    "hugr-py": "0.1.0"
 }
diff --git a/hugr-py/CHANGELOG.md b/hugr-py/CHANGELOG.md
index 825c32f0d..7e32a82be 100644
--- a/hugr-py/CHANGELOG.md
+++ b/hugr-py/CHANGELOG.md
@@ -1 +1,11 @@
 # Changelog
+
+## 0.1.0 (2024-04-15)
+
+This first release includes a pydantic model for the hugr serialization format version 1.
+
+### Features
+
+* Flatten `LeafOp` ([#922](https://github.com/CQCL/hugr/issues/922)) ([3598913](https://github.com/CQCL/hugr/commit/3598913002a361d487aa2f6ba899739d9a3c7f13))
+* No polymorphic closures ([#906](https://github.com/CQCL/hugr/issues/906)) ([b05dd6b](https://github.com/CQCL/hugr/commit/b05dd6b1a15aefee277d4034ed07039a259261e0))
+* **py:** Rename package to `hugr` ([#913](https://github.com/CQCL/hugr/issues/913)) ([9fe65db](https://github.com/CQCL/hugr/commit/9fe65db9dd7fd8eee28c13e6abe71fd5cf05f90a))
diff --git a/hugr-py/pyproject.toml b/hugr-py/pyproject.toml
index 0d4951379..5485d1f91 100644
--- a/hugr-py/pyproject.toml
+++ b/hugr-py/pyproject.toml
@@ -13,7 +13,7 @@ classifiers = [
     "Topic :: Scientific/Engineering",
 ]
 name = "hugr"
-version = "0.1.0a1"
+version = "0.1.0"
 description = "Quantinuum's common representation for quantum programs"
 #keywords = []
 authors = ["TKET development team <tket-support@cambridgequantum.com>"]