diff --git a/.github/workflows/test_action.yml b/.github/workflows/test_action.yml
index 6938411..6af6e34 100644
--- a/.github/workflows/test_action.yml
+++ b/.github/workflows/test_action.yml
@@ -13,12 +13,12 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
 
       - name: Set up Node.js
-        uses: actions/setup-node@v2
+        uses: actions/setup-node@60edb5dd545a775178f52524783378180af0d1f8 # v4.0.2
         with:
-          node-version: 16
+          node-version: 20
 
       - name: Install dependencies
         run: npm ci
diff --git a/witness b/dist/witness
similarity index 100%
rename from witness
rename to dist/witness