diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..08f6bc6
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,43 @@
+name: CI
+
+on:
+  push:
+    branches: [main, master]
+  pull_request:
+  release:
+    types: [published]
+  workflow_dispatch:
+    inputs:
+      version:
+        description: 'Version to publish (e.g., 1.0.0)'
+        required: true
+        type: string
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 8.x
+      - run: yarn install
+      - run: yarn build
+
+  publish:
+    if: github.event_name == 'release' || github.event_name == 'workflow_dispatch'
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 8.x
+      - run: npm config set registry ${{ secrets.NPM_REGISTRY_URL }}
+      - run: yarn install
+      - name: Set version
+        if: github.event_name == 'workflow_dispatch'
+        run: npm version ${{ github.event.inputs.version }} --no-git-tag-version
+      - run: yarn build
+      - run: yarn publish --non-interactive
+        env:
+          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}
diff --git a/src/fns.js b/src/fns.js
index fd07552..680c820 100644
--- a/src/fns.js
+++ b/src/fns.js
@@ -36,8 +36,13 @@ function extractQueryParams(path) {
  * @return {String}
  */
 function extractPath(base, canonicalPath) {
-  let path = canonicalPath?.replace(base, '') || '/'
-  let qsIndex = path.indexOf('?')
+  let path = '/';
+
+  if (canonicalPath != null && typeof canonicalPath === 'string') {
+    path = canonicalPath.replace(base, '') || '/';
+  }
+
+  let qsIndex = path.indexOf('?');
   return (qsIndex > -1) ? path.slice(0, qsIndex) : path
 }