diff --git a/.github/workflows/audit.yml b/.github/workflows/audit.yml
index cf968d9..be9d6d9 100644
--- a/.github/workflows/audit.yml
+++ b/.github/workflows/audit.yml
@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: actions-rs/install@master
         with:
           crate: cargo-audit
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 77aeb58..2ad25cd 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -32,7 +32,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Install Rust toolchain
         uses: actions-rs/toolchain@v1
@@ -67,7 +67,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Install Rust
         run: |
diff --git a/.github/workflows/mdbook.yml b/.github/workflows/mdbook.yml
index 0b81776..b21f4a0 100644
--- a/.github/workflows/mdbook.yml
+++ b/.github/workflows/mdbook.yml
@@ -16,7 +16,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     - name: Install mdBook
       uses: peaceiris/actions-mdbook@v1
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index b82df01..bac0cb3 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - run: cargo login ${CRATES_IO_TOKEN}
         env: