diff --git a/.github/workflows/bazel.yml b/.github/workflows/bazel.yml
index 40a3402..ae8282e 100644
--- a/.github/workflows/bazel.yml
+++ b/.github/workflows/bazel.yml
@@ -14,7 +14,7 @@ jobs:
     - uses: actions/checkout@v1
 
     - name: Mount bazel cache
-      uses: actions/cache@v1
+      uses: actions/cache@v4
       with:
         path: "/home/runner/.cache/bazel"
         key: bazel
diff --git a/README.md b/README.md
index 05ec88f..d967bca 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,9 @@
+# DEPRECATED
+
+Please use https://github.com/android/keyattestation instead.
+
+-----------
+
 Android Key Attestation Library
 ===================================