diff --git a/Cargo.lock b/Cargo.lock
index bf072bfb8..70ce3c0c6 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1206,7 +1206,7 @@ checksum = "6dbf3de79e51f3d586ab4cb9d5c3e2c14aa28ed23d180cf89b4df0454a69cc87"
 
 [[package]]
 name = "hugr"
-version = "0.20.0"
+version = "0.20.1"
 dependencies = [
  "bumpalo",
  "criterion",
@@ -1220,7 +1220,7 @@ dependencies = [
 
 [[package]]
 name = "hugr-cli"
-version = "0.20.0"
+version = "0.20.1"
 dependencies = [
  "assert_cmd",
  "assert_fs",
@@ -1236,7 +1236,7 @@ dependencies = [
 
 [[package]]
 name = "hugr-core"
-version = "0.20.0"
+version = "0.20.1"
 dependencies = [
  "cgmath",
  "cool_asserts",
@@ -1276,7 +1276,7 @@ dependencies = [
 
 [[package]]
 name = "hugr-llvm"
-version = "0.20.0"
+version = "0.20.1"
 dependencies = [
  "anyhow",
  "delegate",
@@ -1295,7 +1295,7 @@ dependencies = [
 
 [[package]]
 name = "hugr-model"
-version = "0.20.0"
+version = "0.20.1"
 dependencies = [
  "base64",
  "bumpalo",
@@ -1319,7 +1319,7 @@ dependencies = [
 
 [[package]]
 name = "hugr-passes"
-version = "0.20.0"
+version = "0.20.1"
 dependencies = [
  "ascent",
  "derive_more 1.0.0",
diff --git a/hugr-cli/Cargo.toml b/hugr-cli/Cargo.toml
index cd7d1fb26..917a01a80 100644
--- a/hugr-cli/Cargo.toml
+++ b/hugr-cli/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "hugr-cli"
-version = "0.20.0"
+version = "0.20.1"
 edition = { workspace = true }
 rust-version = { workspace = true }
 license = { workspace = true }
@@ -19,7 +19,7 @@ bench = false
 clap = { workspace = true, features = ["derive", "cargo"] }
 clap-verbosity-flag.workspace = true
 derive_more = { workspace = true, features = ["display", "error", "from"] }
-hugr = { path = "../hugr", version = "0.20.0" }
+hugr = { path = "../hugr", version = "0.20.1" }
 serde_json.workspace = true
 clio = { workspace = true, features = ["clap-parse"] }
 
diff --git a/hugr-core/CHANGELOG.md b/hugr-core/CHANGELOG.md
index 04c5d3d0c..a80c14ed7 100644
--- a/hugr-core/CHANGELOG.md
+++ b/hugr-core/CHANGELOG.md
@@ -1,5 +1,29 @@
 # Changelog
 
+## [0.20.1](https://github.com/CQCL/hugr/compare/hugr-core-v0.20.0...hugr-core-v0.20.1) - 2025-05-28
+
+### Bug Fixes
+
+- check well-definedness of DFG wires in validate ([#2221](https://github.com/CQCL/hugr/pull/2221))
+- Check for order edges in SiblingSubgraph::from_node ([#2223](https://github.com/CQCL/hugr/pull/2223))
+- Make SumType::Unit(N) equal to SumType::General([(); N]) ([#2250](https://github.com/CQCL/hugr/pull/2250))
+
+### New Features
+
+- Add PersistentHugr ([#2080](https://github.com/CQCL/hugr/pull/2080))
+- Add `Type::used_extensions` ([#2224](https://github.com/CQCL/hugr/pull/2224))
+- Add boundary edge traversal in SimpleReplacement ([#2231](https://github.com/CQCL/hugr/pull/2231))
+- Add signature map function for DFGs ([#2239](https://github.com/CQCL/hugr/pull/2239))
+- PersistentHugr implements HugrView ([#2202](https://github.com/CQCL/hugr/pull/2202))
+
+### Refactor
+
+- tidies/readability improvements to PersistentHugr ([#2251](https://github.com/CQCL/hugr/pull/2251))
+
+### Testing
+
+- Ignore miri errors in tests involving `assert_snapshot` ([#2261](https://github.com/CQCL/hugr/pull/2261))
+
 ## [0.20.0](https://github.com/CQCL/hugr/compare/hugr-core-v0.15.4...hugr-core-v0.20.0) - 2025-05-14
 
 ### Bug Fixes
diff --git a/hugr-core/Cargo.toml b/hugr-core/Cargo.toml
index e15c1c037..4815f097b 100644
--- a/hugr-core/Cargo.toml
+++ b/hugr-core/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "hugr-core"
-version = "0.20.0"
+version = "0.20.1"
 edition = { workspace = true }
 rust-version = { workspace = true }
 
@@ -27,7 +27,7 @@ bench = false
 name = "model"
 
 [dependencies]
-hugr-model = { version = "0.20.0", path = "../hugr-model" }
+hugr-model = { version = "0.20.1", path = "../hugr-model" }
 
 cgmath = { workspace = true, features = ["serde"] }
 delegate = { workspace = true }
diff --git a/hugr-llvm/CHANGELOG.md b/hugr-llvm/CHANGELOG.md
index ad75b6c6c..9fad1a7c0 100644
--- a/hugr-llvm/CHANGELOG.md
+++ b/hugr-llvm/CHANGELOG.md
@@ -5,6 +5,16 @@ 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).
 
 
+## [0.20.1](https://github.com/CQCL/hugr/compare/hugr-llvm-v0.20.0...hugr-llvm-v0.20.1) - 2025-05-28
+
+### Bug Fixes
+
+- Make SumType::Unit(N) equal to SumType::General([(); N]) ([#2250](https://github.com/CQCL/hugr/pull/2250))
+
+### Testing
+
+- Add exec tests for widen op ([#2043](https://github.com/CQCL/hugr/pull/2043))
+
 ## [0.20.0](https://github.com/CQCL/hugr/compare/hugr-llvm-v0.15.4...hugr-llvm-v0.20.0) - 2025-05-14
 
 ### Bug Fixes
diff --git a/hugr-llvm/Cargo.toml b/hugr-llvm/Cargo.toml
index 5a96450f4..ac8dcbd95 100644
--- a/hugr-llvm/Cargo.toml
+++ b/hugr-llvm/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "hugr-llvm"
-version = "0.20.0"
+version = "0.20.1"
 description = "A general and extensible crate for lowering HUGRs into LLVM IR"
 
 edition.workspace = true
@@ -26,7 +26,7 @@ workspace = true
 
 [dependencies]
 inkwell = { version = "0.6.0", default-features = false }
-hugr-core = { path = "../hugr-core", version = "0.20.0" }
+hugr-core = { path = "../hugr-core", version = "0.20.1" }
 anyhow = "1.0.98"
 itertools.workspace = true
 delegate.workspace = true
diff --git a/hugr-model/Cargo.toml b/hugr-model/Cargo.toml
index cc11a2320..9f9b046b5 100644
--- a/hugr-model/Cargo.toml
+++ b/hugr-model/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "hugr-model"
-version = "0.20.0"
+version = "0.20.1"
 readme = "README.md"
 documentation = "https://docs.rs/hugr-model/"
 description = "Data model for Quantinuum's HUGR intermediate representation"
diff --git a/hugr-passes/Cargo.toml b/hugr-passes/Cargo.toml
index 4a6a00645..d751d82d5 100644
--- a/hugr-passes/Cargo.toml
+++ b/hugr-passes/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "hugr-passes"
-version = "0.20.0"
+version = "0.20.1"
 edition = { workspace = true }
 rust-version = { workspace = true }
 license = { workspace = true }
@@ -19,7 +19,7 @@ workspace = true
 bench = false
 
 [dependencies]
-hugr-core = { path = "../hugr-core", version = "0.20.0" }
+hugr-core = { path = "../hugr-core", version = "0.20.1" }
 portgraph = { workspace = true }
 ascent = { version = "0.8.0" }
 derive_more = { workspace = true, features = ["display", "error", "from"] }
diff --git a/hugr-py/Cargo.toml b/hugr-py/Cargo.toml
index 44ec5a365..b47f05464 100644
--- a/hugr-py/Cargo.toml
+++ b/hugr-py/Cargo.toml
@@ -21,6 +21,6 @@ bench = false
 
 [dependencies]
 bumpalo = { workspace = true, features = ["collections"] }
-hugr-model = { version = "0.20.0", path = "../hugr-model", features = ["pyo3"] }
+hugr-model = { version = "0.20.1", path = "../hugr-model", features = ["pyo3"] }
 paste.workspace = true
 pyo3 = { workspace = true, features = ["extension-module", "abi3-py310"] }
diff --git a/hugr/CHANGELOG.md b/hugr/CHANGELOG.md
index 2fc92e165..6dbd8836b 100644
--- a/hugr/CHANGELOG.md
+++ b/hugr/CHANGELOG.md
@@ -1,5 +1,29 @@
 # Changelog
 
+## [0.20.1](https://github.com/CQCL/hugr/compare/hugr-v0.20.0...hugr-v0.20.1) - 2025-05-28
+
+### Bug Fixes
+
+- check well-definedness of DFG wires in validate ([#2221](https://github.com/CQCL/hugr/pull/2221))
+- Check for order edges in SiblingSubgraph::from_node ([#2223](https://github.com/CQCL/hugr/pull/2223))
+- Make SumType::Unit(N) equal to SumType::General([(); N]) ([#2250](https://github.com/CQCL/hugr/pull/2250))
+
+### New Features
+
+- Add PersistentHugr ([#2080](https://github.com/CQCL/hugr/pull/2080))
+- Add `Type::used_extensions` ([#2224](https://github.com/CQCL/hugr/pull/2224))
+- Add boundary edge traversal in SimpleReplacement ([#2231](https://github.com/CQCL/hugr/pull/2231))
+- Add signature map function for DFGs ([#2239](https://github.com/CQCL/hugr/pull/2239))
+- PersistentHugr implements HugrView ([#2202](https://github.com/CQCL/hugr/pull/2202))
+
+### Refactor
+
+- tidies/readability improvements to PersistentHugr ([#2251](https://github.com/CQCL/hugr/pull/2251))
+
+### Testing
+
+- Ignore miri errors in tests involving `assert_snapshot` ([#2261](https://github.com/CQCL/hugr/pull/2261))
+
 ## [0.20.0](https://github.com/CQCL/hugr/compare/hugr-v0.15.4...hugr-v0.20.0) - 2025-05-14
 
 This release contains a big list of changes reworking multiple core definitions of HUGR.
diff --git a/hugr/Cargo.toml b/hugr/Cargo.toml
index c6c1cab5e..5cd388586 100644
--- a/hugr/Cargo.toml
+++ b/hugr/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "hugr"
-version = "0.20.0"
+version = "0.20.1"
 edition = { workspace = true }
 rust-version = { workspace = true }
 
@@ -30,10 +30,10 @@ llvm-test = ["hugr-llvm/llvm14-0", "hugr-llvm/test-utils"]
 zstd = ["hugr-core/zstd"]
 
 [dependencies]
-hugr-model = { path = "../hugr-model", version = "0.20.0" }
-hugr-core = { path = "../hugr-core", version = "0.20.0" }
-hugr-passes = { path = "../hugr-passes", version = "0.20.0" }
-hugr-llvm = { path = "../hugr-llvm", version = "0.20.0", optional = true }
+hugr-model = { path = "../hugr-model", version = "0.20.1" }
+hugr-core = { path = "../hugr-core", version = "0.20.1" }
+hugr-passes = { path = "../hugr-passes", version = "0.20.1" }
+hugr-llvm = { path = "../hugr-llvm", version = "0.20.1", optional = true }
 
 [dev-dependencies]
 lazy_static = { workspace = true }