diff --git a/.github/workflows/podcast.yml b/.github/workflows/podcast.yml
index 5f91e506..015448af 100644
--- a/.github/workflows/podcast.yml
+++ b/.github/workflows/podcast.yml
@@ -6,7 +6,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with:
         persist-credentials: false
 
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index 15d14ca3..e8ce774a 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -9,7 +9,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with:
         persist-credentials: false
 
@@ -32,7 +32,7 @@ jobs:
         bundle exec jekyll build
 
     - name: Deploy
-      uses: peaceiris/actions-gh-pages@v3
+      uses: peaceiris/actions-gh-pages@4eb285e828117bca26638192c3ed309c622e7bad
       with:
         github_token: ${{ secrets.GITHUB_TOKEN }}
         publish_dir: ./_site