diff --git a/.github/workflows/build-and-tests.yml b/.github/workflows/build-and-tests.yml
index 05b3bbd64..7e924dcbb 100644
--- a/.github/workflows/build-and-tests.yml
+++ b/.github/workflows/build-and-tests.yml
@@ -160,6 +160,9 @@ jobs:
               sudo apt-get update
               sudo apt-get install gcc-powerpc64le-linux-gnu g++-powerpc64le-linux-gnu -y
             cross: napi
+          - host: ubuntu-latest
+            target: powerpc64le-unknown-linux-musl
+            cross: zig
           - host: ubuntu-latest
             target: s390x-unknown-linux-gnu
             env:
@@ -183,6 +186,9 @@ jobs:
                 --slave /usr/bin/loongarch64-linux-gnu-gcov loongarch64-linux-gnu-gcov /usr/bin/loongarch64-linux-gnu-gcov-13
               sudo update-alternatives \
                 --install /usr/bin/loongarch64-linux-gnu-cpp loongarch64-linux-gnu-cpp /usr/bin/loongarch64-linux-gnu-cpp-13 100
+          - host: ubuntu-latest
+            target: loongarch64-unknown-linux-musl
+            cross: zig
           - host: ubuntu-latest
             target: aarch64-unknown-linux-ohos
 
@@ -302,6 +308,65 @@ jobs:
           if-no-files-found: error
         if: ${{ !matrix.settings.is-wasm-build }}
 
+  build-openbsd:
+    name: Build x86_64-unknown-openbsd
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        os:
+          - name: openbsd
+            architecture: x86-64
+            version: '7.8'
+
+    steps:
+      - name: Checkout Commit
+        uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+
+      - name: Restore Cargo cache
+        uses: actions/cache/restore@9255dc7a253b0ccc959486e2bca901246202afeb # v5.0.1
+        with:
+          path: |
+            ~/.cargo/registry/index/
+            ~/.cargo/registry/cache/
+            ~/.cargo/git/db/
+            .cargo-cache
+            rust/target/
+          key: x86_64-unknown-openbsd-cargo-ubuntu-latest-${{ hashFiles('rust/Cargo.lock') }}
+          restore-keys: x86_64-unknown-openbsd-cargo-ubuntu-latest
+
+      - name: Install and Cache Node Dependencies
+        uses: ./.github/actions/install-and-cache-node-deps
+
+      - name: Build (OpenBSD)
+        uses: cross-platform-actions/action@v0.32.0
+        with:
+          operating_system: ${{ matrix.os.name }}
+          architecture: ${{ matrix.os.architecture }}
+          version: ${{ matrix.os.version }}
+          run: |
+            sudo pkg_add rust node cmake
+            sed -i 's^rustflags.*^^g' rust/bindings_napi/.cargo/config.toml
+            npm run build:napi
+
+      - name: Save Cargo cache
+        if: github.ref == 'refs/heads/master'
+        uses: actions/cache/save@9255dc7a253b0ccc959486e2bca901246202afeb # v5.0.1
+        with:
+          path: |
+            ~/.cargo/registry/index/
+            ~/.cargo/registry/cache/
+            ~/.cargo/git/db/
+            .cargo-cache
+            rust/target/
+          key: x86_64-unknown-openbsd-cargo-ubuntu-latest-${{ hashFiles('rust/Cargo.lock') }}
+
+      - name: Upload napi artifact
+        uses: actions/upload-artifact@b7c566a772e6b6bfb58ed0dc250532a479d7789f # v6.0.0
+        with:
+          name: bindings-x86_64-unknown-openbsd
+          path: ${{ env.APP_NAME }}.*.node
+          if-no-files-found: error
+
   # smoke test for some architectures that do not receive the full test suite
   smoke-test:
     permissions:
@@ -392,6 +457,7 @@ jobs:
     name: Test${{ matrix.additionalName || '' }} Node ${{ matrix.node }} (${{ matrix.settings.target }})
     needs:
       - build
+      - build-openbsd
     strategy:
       fail-fast: false
       matrix:
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4c8606ab7..2c133ceed 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,48 @@
 # rollup changelog
 
+## 4.55.1
+
+_2026-01-05_
+
+### Bug Fixes
+
+- Fix artifact reference for OpenBSD (#6231)
+
+### Pull Requests
+
+- [#6231](https://github.com/rollup/rollup/pull/6231): Fix OpenBSD artifacts and ensure OIDC is working (@lukastaegert)
+
+## 4.55.0
+
+_2026-01-05_
+
+### Features
+
+- Natively support ppc64 Linux Musl targets (#5997)
+- Natively support loong64 Linux Musl targets (#5997)
+- Natively support OpenBSD targets (#6224)
+
+### Bug Fixes
+
+- Prevent some cycles when using top-level-await (#6221)
+- Warn when generating cycling manual chunks (#6225)
+
+### Pull Requests
+
+- [#5997](https://github.com/rollup/rollup/pull/5997): Add support for ppc64 & loong64 musl linux (@fossdd)
+- [#6218](https://github.com/rollup/rollup/pull/6218): fix(deps): update swc monorepo (major) (@renovate[bot], @lukastaegert)
+- [#6219](https://github.com/rollup/rollup/pull/6219): fix(deps): lock file maintenance minor/patch updates (@renovate[bot])
+- [#6220](https://github.com/rollup/rollup/pull/6220): chore(deps): lock file maintenance (@renovate[bot])
+- [#6221](https://github.com/rollup/rollup/pull/6221): Handle TLA dynamic import cycles in chunkAssignment (@TrickyPi)
+- [#6222](https://github.com/rollup/rollup/pull/6222): Apply to adjust the description of the command-line parameter 'rollup… (@image-gif, @lukastaegert)
+- [#6223](https://github.com/rollup/rollup/pull/6223): Deduplicate CLI help file (@lukastaegert)
+- [#6224](https://github.com/rollup/rollup/pull/6224): OpenBSD support (@edshot99, @lukastaegert)
+- [#6225](https://github.com/rollup/rollup/pull/6225): Throw a warning for circular chunks (@TrickyPi)
+- [#6226](https://github.com/rollup/rollup/pull/6226): fix(deps): update swc monorepo (major) (@renovate[bot])
+- [#6227](https://github.com/rollup/rollup/pull/6227): chore(deps): lock file maintenance minor/patch updates (@renovate[bot])
+- [#6228](https://github.com/rollup/rollup/pull/6228): chore(deps): lock file maintenance minor/patch updates (@renovate[bot])
+- [#6229](https://github.com/rollup/rollup/pull/6229): chore(deps): lock file maintenance minor/patch updates (@renovate[bot])
+
 ## 4.54.0
 
 _2025-12-20_
diff --git a/browser/package.json b/browser/package.json
index a4761b1e1..e3c5f3c69 100644
--- a/browser/package.json
+++ b/browser/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@rollup/browser",
-  "version": "4.54.0",
+  "version": "4.55.1",
   "description": "Next-generation ES module bundler browser build",
   "main": "dist/rollup.browser.js",
   "module": "dist/es/rollup.browser.js",
diff --git a/native.js b/native.js
index c5a65c3ed..e49848245 100644
--- a/native.js
+++ b/native.js
@@ -34,12 +34,15 @@ const bindingsByPlatformAndArch = {
 	linux: {
 		arm: { base: 'linux-arm-gnueabihf', musl: 'linux-arm-musleabihf' },
 		arm64: { base: 'linux-arm64-gnu', musl: 'linux-arm64-musl' },
-		loong64: { base: 'linux-loong64-gnu', musl: null },
-		ppc64: { base: 'linux-ppc64-gnu', musl: null },
+		loong64: { base: 'linux-loong64-gnu', musl: 'linux-loong64-musl' },
+		ppc64: { base: 'linux-ppc64-gnu', musl: 'linux-ppc64-musl' },
 		riscv64: { base: 'linux-riscv64-gnu', musl: 'linux-riscv64-musl' },
 		s390x: { base: 'linux-s390x-gnu', musl: null },
 		x64: { base: 'linux-x64-gnu', musl: 'linux-x64-musl' }
 	},
+	openbsd: {
+		x64: { base: 'openbsd-x64' }
+	},
 	openharmony: {
 		arm64: { base: 'openharmony-arm64' }
 	},
diff --git a/npm/linux-loong64-musl/README.md b/npm/linux-loong64-musl/README.md
new file mode 100644
index 000000000..471875c26
--- /dev/null
+++ b/npm/linux-loong64-musl/README.md
@@ -0,0 +1,3 @@
+# `@rollup/rollup-linux-loong64-musl`
+
+This is the **loongarch64-unknown-linux-musl** binary for `rollup`
diff --git a/npm/linux-loong64-musl/package.json b/npm/linux-loong64-musl/package.json
new file mode 100644
index 000000000..e5ad45c8f
--- /dev/null
+++ b/npm/linux-loong64-musl/package.json
@@ -0,0 +1,25 @@
+{
+  "name": "@rollup/rollup-linux-loong64-musl",
+  "version": "0.0.0",
+  "os": [
+    "linux"
+  ],
+  "cpu": [
+    "loong64"
+  ],
+  "files": [
+    "rollup.linux-loong64-musl.node"
+  ],
+  "description": "Native bindings for Rollup",
+  "author": "Lukas Taegert-Atkinson",
+  "homepage": "https://rollupjs.org/",
+  "license": "MIT",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/rollup/rollup.git"
+  },
+  "libc": [
+    "musl"
+  ],
+  "main": "./rollup.linux-loong64-musl.node"
+}
diff --git a/npm/linux-ppc64-musl/README.md b/npm/linux-ppc64-musl/README.md
new file mode 100644
index 000000000..dbfcfd1c1
--- /dev/null
+++ b/npm/linux-ppc64-musl/README.md
@@ -0,0 +1,3 @@
+# `@rollup/rollup-linux-ppc64-musl`
+
+This is the **powerpc64le-unknown-linux-musl** binary for `rollup`
diff --git a/npm/linux-ppc64-musl/package.json b/npm/linux-ppc64-musl/package.json
new file mode 100644
index 000000000..ce6cf5add
--- /dev/null
+++ b/npm/linux-ppc64-musl/package.json
@@ -0,0 +1,25 @@
+{
+  "name": "@rollup/rollup-linux-ppc64-musl",
+  "version": "0.0.0",
+  "os": [
+    "linux"
+  ],
+  "cpu": [
+    "ppc64"
+  ],
+  "files": [
+    "rollup.linux-ppc64-musl.node"
+  ],
+  "description": "Native bindings for Rollup",
+  "author": "Lukas Taegert-Atkinson",
+  "homepage": "https://rollupjs.org/",
+  "license": "MIT",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/rollup/rollup.git"
+  },
+  "libc": [
+    "musl"
+  ],
+  "main": "./rollup.linux-ppc64-musl.node"
+}
diff --git a/npm/openbsd-x64/README.md b/npm/openbsd-x64/README.md
new file mode 100644
index 000000000..8f599d029
--- /dev/null
+++ b/npm/openbsd-x64/README.md
@@ -0,0 +1,3 @@
+# `@rollup/rollup-openbsd-x64`
+
+This is the **x86_64-unknown-openbsd** binary for `rollup`
diff --git a/npm/openbsd-x64/package.json b/npm/openbsd-x64/package.json
new file mode 100644
index 000000000..deb0d40ae
--- /dev/null
+++ b/npm/openbsd-x64/package.json
@@ -0,0 +1,22 @@
+{
+  "name": "@rollup/rollup-openbsd-x64",
+  "version": "0.0.0",
+  "os": [
+    "openbsd"
+  ],
+  "cpu": [
+    "x64"
+  ],
+  "files": [
+    "rollup.openbsd-x64.node"
+  ],
+  "description": "Native bindings for Rollup",
+  "author": "Lukas Taegert-Atkinson",
+  "homepage": "https://rollupjs.org/",
+  "license": "MIT",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/rollup/rollup.git"
+  },
+  "main": "./rollup.openbsd-x64.node"
+}
diff --git a/package-lock.json b/package-lock.json
index 7b8306a44..e60f63c75 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "rollup",
-  "version": "4.54.0",
+  "version": "4.55.1",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "rollup",
-      "version": "4.54.0",
+      "version": "4.55.1",
       "license": "MIT",
       "dependencies": {
         "@types/estree": "1.0.8"
diff --git a/package.json b/package.json
index 67bbda327..5181c70c9 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "rollup",
-  "version": "4.54.0",
+  "version": "4.55.1",
   "description": "Next-generation ES module bundler",
   "main": "dist/rollup.js",
   "module": "dist/es/rollup.js",
@@ -23,9 +23,11 @@
       "armv7-unknown-linux-musleabihf",
       "i686-pc-windows-msvc",
       "loongarch64-unknown-linux-gnu",
+      "loongarch64-unknown-linux-musl",
       "riscv64gc-unknown-linux-gnu",
       "riscv64gc-unknown-linux-musl",
       "powerpc64le-unknown-linux-gnu",
+      "powerpc64le-unknown-linux-musl",
       "s390x-unknown-linux-gnu",
       "x86_64-apple-darwin",
       "x86_64-pc-windows-gnu",
@@ -33,6 +35,7 @@
       "x86_64-unknown-freebsd",
       "x86_64-unknown-linux-gnu",
       "x86_64-unknown-linux-musl",
+      "x86_64-unknown-openbsd",
       "aarch64-unknown-linux-ohos"
     ]
   },