diff --git a/.github/actions/copyright-message/test_copyright.py b/.github/actions/copyright-message/test_copyright.py
new file mode 100644
index 0000000..5dfbd4c
--- /dev/null
+++ b/.github/actions/copyright-message/test_copyright.py
@@ -0,0 +1,7 @@
+import re
+
+def test_copyright():
+    pattern = re.compile(r"^Copyright\(c\) [a-zA-Z0-9 ]+ \d{4}$")
+    with open("copyright.txt", "r") as file:
+        content = file.read().strip()
+        assert pattern.match(content), "Copyright message does not match the expected format."
diff --git a/.github/workflows/validate-copyright.yml b/.github/workflows/validate-copyright.yml
index 0425347..3c6640e 100644
--- a/.github/workflows/validate-copyright.yml
+++ b/.github/workflows/validate-copyright.yml
@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout PR head
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4.1.1
         with:
           ref: ${{ github.event.pull_request.head.sha }}