diff --git a/.github/workflows/npm-publish-github-packages.yml b/.github/workflows/npm-publish-github-packages.yml
new file mode 100644
index 0000000..47a37f9
--- /dev/null
+++ b/.github/workflows/npm-publish-github-packages.yml
@@ -0,0 +1,36 @@
+# This workflow will run tests using node and then publish a package to GitHub Packages when a release is created
+# For more information see: https://docs.github.com/en/actions/publishing-packages/publishing-nodejs-packages
+
+name: Node.js Package
+
+on:
+  release:
+    types: [created]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-node@v3
+        with:
+          node-version: 16
+      - run: npm ci
+      - run: npm test
+
+  publish-gpr:
+    needs: build
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-node@v3
+        with:
+          node-version: 16
+          registry-url: https://npm.pkg.github.com/
+      - run: npm ci
+      - run: npm publish
+        env:
+          NODE_AUTH_TOKEN: ${{secrets.GITHUB_TOKEN}}
diff --git a/index.js b/index.js
index 7c8b62e..a0b3883 100755
--- a/index.js
+++ b/index.js
@@ -9,7 +9,7 @@ module.exports = class Billplz {
 
     this._apiKey = null
     this._apiEndpoint = 'https://www.billplz.com/api/v3/'
-    this._sandboxApiEndpoint = 'https://billplz-staging.herokuapp.com/api/v3/'
+    this._sandboxApiEndpoint = 'https://www.billplz-sandbox.com/api/v3/'
     this._isSandbox = false
 
     if (typeof options === 'object') {