diff --git a/.github/release-please-config.json b/.github/release-please-config.json
new file mode 100644
index 0000000..d8a0a03
--- /dev/null
+++ b/.github/release-please-config.json
@@ -0,0 +1,13 @@
+{
+  "$schema": "https://raw.githubusercontent.com/googleapis/release-please/main/schemas/config.json",
+
+  "bootstrap-sha": "2d9e7604709aa131c1d835d1d8a2df5ccd68d6eb",
+
+  "include-component-in-tag": false,
+
+  "packages": {
+    ".": {
+      "release-type": "node"
+    }
+  }
+}
diff --git a/.github/workflows/release-please.yaml b/.github/workflows/release-please.yaml
new file mode 100644
index 0000000..25ec451
--- /dev/null
+++ b/.github/workflows/release-please.yaml
@@ -0,0 +1,20 @@
+on:
+  push:
+    branches:
+      - master
+
+permissions:
+  contents: write
+  pull-requests: write
+
+name: release-please
+
+jobs:
+  release-please:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: google-github-actions/release-please-action@v4
+        with:
+          # use a token so that git pushes trigger subsequent workflow runs
+          token: ${{ secrets.RELEASE_PLEASE_TOKEN }}
+          config-file: .github/release-please-config.json
diff --git a/.release-please-manifest.json b/.release-please-manifest.json
new file mode 100644
index 0000000..9dc6cef
--- /dev/null
+++ b/.release-please-manifest.json
@@ -0,0 +1,3 @@
+{
+  ".": "3.4.0"
+}
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 454c5e9..c885303 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # node-midi Changelog
 
+## Version 3.5.0
+
+- Add midi constants
+
 ## Version 3.4.0
 
 - Add windows-arm64 build