diff --git a/.github/workflows/release-please.yml b/.github/workflows/release-please.yml
index dd6f3f7..cfd555e 100644
--- a/.github/workflows/release-please.yml
+++ b/.github/workflows/release-please.yml
@@ -4,12 +4,51 @@ on:
     branches:
       - master
 
+permissions:
+  contents: write
+  pull-requests: write
+
 jobs:
   release-please:
     runs-on: ubuntu-latest
+    outputs:
+      release_created: ${{ steps.release.outputs.release_created }}
 
     steps:
       - name: Release Please
         uses: google-github-actions/release-please-action@v4
+        id: release
         with:
           release-type: node
+
+  publish:
+    needs: release-please
+    runs-on: ubuntu-latest
+    if: ${{ needs.release-please.outputs.release_created }}
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Use Node.js
+        uses: actions/setup-node@v4
+        with:
+          cache: npm
+          node-version-file: .nvmrc
+
+      - name: Install dependencies
+        run: npm ci --prefer-offline
+
+      - name: Read package version
+        run: echo "VERSION=$(jq -r .version package.json)" >> $GITHUB_ENV
+
+      - name: Build
+        run: npm run bundle
+
+      - name: Setup butler
+        uses: remarkablegames/setup-butler@v1
+
+      - name: Upload to itch.io
+        run: butler push dist ${{ github.repository }}:html5 --userversion ${{ env.VERSION }}
+        env:
+          BUTLER_API_KEY: ${{ secrets.BUTLER_API_KEY }}
diff --git a/scripts/bundle.sh b/scripts/bundle.sh
index dcd84b3..15c90c6 100755
--- a/scripts/bundle.sh
+++ b/scripts/bundle.sh
@@ -3,14 +3,16 @@
 BUNDLE=true npm run build
 
 # replace absolute URLs with relative URLs
-if [ "$(uname)" == 'Darwin' ]; then
+if [[ $(uname) == 'Darwin' ]]; then
   sed -i '' -e 's|src="/|src="|g' -e 's|href="/|href="|g' dist/index.html
 else
   sed -i -e 's|src="/|src="|g' -e 's|href="/|href="|g' dist/index.html
 fi
 
 # zip file
-zip -r "dist/$(npm pkg get name | tr -d \")-$(npm pkg get version | tr -d \").zip" dist
-echo
-find dist -type f -depth 1 -name '*.zip'
-open dist
+if [[ $CI != 'true' ]]; then
+  zip -r "dist/$(npm pkg get name | tr -d \")-$(npm pkg get version | tr -d \").zip" dist
+  echo
+  find dist -type f -depth 1 -name '*.zip'
+  open dist
+fi