diff --git a/.github/workflows/ssh-cipher.yml b/.github/workflows/ssh-cipher.yml
index b48a2f7..59b97cf 100644
--- a/.github/workflows/ssh-cipher.yml
+++ b/.github/workflows/ssh-cipher.yml
@@ -34,7 +34,7 @@ jobs:
           - thumbv7em-none-eabi
           - wasm32-unknown-unknown
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@stable
         with:
           toolchain: ${{ matrix.rust }}
@@ -50,7 +50,7 @@ jobs:
           - 1.60.0 # MSRV
           - stable
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@stable
         with:
           toolchain: ${{ matrix.rust }}
diff --git a/.github/workflows/ssh-encoding.yml b/.github/workflows/ssh-encoding.yml
index deff028..6191274 100644
--- a/.github/workflows/ssh-encoding.yml
+++ b/.github/workflows/ssh-encoding.yml
@@ -33,7 +33,7 @@ jobs:
           - thumbv7em-none-eabi
           - wasm32-unknown-unknown
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@stable
         with:
           toolchain: ${{ matrix.rust }}
@@ -49,7 +49,7 @@ jobs:
           - 1.60.0 # MSRV
           - stable
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@stable
         with:
           toolchain: ${{ matrix.rust }}
diff --git a/.github/workflows/ssh-key.yml b/.github/workflows/ssh-key.yml
index bce6cd5..f402cd9 100644
--- a/.github/workflows/ssh-key.yml
+++ b/.github/workflows/ssh-key.yml
@@ -40,7 +40,7 @@ jobs:
             rust: stable
     runs-on: ${{ matrix.platform }}
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@stable
         with:
           toolchain: ${{ matrix.rust }}
@@ -51,7 +51,7 @@ jobs:
   minimal-versions:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@nightly
       - run: cargo +nightly update -Z minimal-versions
       - uses: dtolnay/rust-toolchain@1.65.0
@@ -69,7 +69,7 @@ jobs:
           - thumbv7em-none-eabi
           - wasm32-unknown-unknown
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@stable
         with:
           toolchain: ${{ matrix.rust }}
@@ -85,7 +85,7 @@ jobs:
           - 1.65.0 # MSRV
           - stable
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@stable
         with:
           toolchain: ${{ matrix.rust }}
diff --git a/.github/workflows/workspace.yml b/.github/workflows/workspace.yml
index 662cd9d..49feb1a 100644
--- a/.github/workflows/workspace.yml
+++ b/.github/workflows/workspace.yml
@@ -18,7 +18,7 @@ jobs:
   clippy:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@stable
         with:
           toolchain: 1.69.0
@@ -28,7 +28,7 @@ jobs:
   doc:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       
       - uses: dtolnay/rust-toolchain@stable
         with:
@@ -38,7 +38,7 @@ jobs:
   rustfmt:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@stable
         with:
           toolchain: stable