diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 3b5609e..6978b37 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -23,7 +23,7 @@ jobs:
       - name: Node.js setup ${{ matrix.node-version }}
         uses: actions/setup-node@v4
         with:
-          cache: 'npm'
+          cache: npm
           cache-dependency-path: package-lock.json
           node-version: ${{ matrix.node-version }}
 
diff --git a/.github/workflows/npm-publish.yml b/.github/workflows/npm-publish.yml
new file mode 100644
index 0000000..84bac17
--- /dev/null
+++ b/.github/workflows/npm-publish.yml
@@ -0,0 +1,29 @@
+name: npm publish
+
+on:
+  pull_request:
+    types: [ closed ]
+
+jobs:
+  publish-npm:
+    if: github.event.pull_request.merged
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Repository checkout
+        uses: actions/checkout@v4
+
+      - name: Node.js setup
+        uses: actions/setup-node@v4
+        with:
+          cache: npm
+          cache-dependency-path: package-lock.json
+          node-version: 20.17.x
+
+      - name: Dependencies installation
+        run: npm ci
+
+      - env:
+          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}
+        name: Publish to npm
+        run: npm publish
diff --git a/package-lock.json b/package-lock.json
index 3afe58b..c81e942 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "@stassi/leaf",
-  "version": "0.0.19",
+  "version": "0.0.20",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "@stassi/leaf",
-      "version": "0.0.19",
+      "version": "0.0.20",
       "cpu": [
         "arm64",
         "x64"
diff --git a/package.json b/package.json
index 0e7da20..4dd72d1 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@stassi/leaf",
-  "version": "0.0.19",
+  "version": "0.0.20",
   "private": true,
   "description": "Leaflet adapter.",
   "keywords": [
@@ -32,6 +32,7 @@
     "preimport:leaflet:fullscreen": "shx mkdir -p public/leaflet/fullscreen",
     "import:leaflet:fullscreen": "shx cp -r node_modules/leaflet-fullscreen/dist/* public/leaflet/fullscreen",
     "lint": "eslint .",
+    "prepublishOnly": "npm test",
     "serve": "serve",
     "serve:test": "serve -p 3001",
     "prestart": "npm run build",