diff --git a/README.md b/README.md
index 6085110..4145231 100644
--- a/README.md
+++ b/README.md
@@ -82,10 +82,10 @@ jobs:
   build_and_deploy:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       # Use GitHub Actions' cache to cache dependencies on servers
-      - uses: actions/cache@v3
+      - uses: actions/cache@v4
         with:
           path: |
             .asdf/**