diff --git a/.github/workflows/cargo-audit.yaml b/.github/workflows/cargo-audit.yaml
index fdb6dbea..c2919437 100644
--- a/.github/workflows/cargo-audit.yaml
+++ b/.github/workflows/cargo-audit.yaml
@@ -13,7 +13,7 @@ jobs:
     name: Security Audit
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Cache cargo bin
         uses: actions/cache@v3
         with:
diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 1ddc5a2b..56f31080 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -15,7 +15,7 @@ jobs:
   lint:
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@stable
         with:
           components: rustfmt
@@ -36,7 +36,7 @@ jobs:
     needs:
       - "lint"
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: Swatinem/rust-cache@v2
         with:
           cache-on-failure: "true"
@@ -49,7 +49,7 @@ jobs:
     needs:
       - "lint"
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@stable
       - run: cargo install cargo-sort
       - run: cargo sort --workspace --check >/dev/null
@@ -66,7 +66,7 @@ jobs:
     # Prevent beta warnings from causing CI failure
     continue-on-error: ${{ matrix.rust == 'beta' }}
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: mobilecoinfoundation/actions/dcap-libs@main
         with:
           version: 1.16.100.2-jammy1
@@ -88,7 +88,7 @@ jobs:
           - beta
           - nightly-2022-12-13
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: mobilecoinfoundation/actions/sgxsdk@main
         with:
           version: 2.19.100.3
@@ -112,7 +112,7 @@ jobs:
           - beta
           - nightly-2022-12-13
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: mobilecoinfoundation/actions/sgxsdk@main
         with:
           version: 2.19.100.3
@@ -136,7 +136,7 @@ jobs:
           - beta
           - nightly-2022-12-13
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: mobilecoinfoundation/actions/sgxsdk@main
         with:
           version: 2.19.100.3
@@ -165,7 +165,7 @@ jobs:
     # Prevent beta warnings from causing CI failure
     continue-on-error: ${{ matrix.rust == 'beta' }}
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@master
         with:
           toolchain: ${{ matrix.rust }}
@@ -177,7 +177,7 @@ jobs:
     needs:
       - "lint"
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: mobilecoinfoundation/actions/sgxsdk@main
         with:
           version: 2.19.100.3
@@ -214,7 +214,7 @@ jobs:
           - aarch64-apple-ios
           - wasm32-unknown-unknown
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@master
         with:
           toolchain: nightly-2022-12-13
diff --git a/.github/workflows/copyright.yaml b/.github/workflows/copyright.yaml
index ff503472..21137f44 100644
--- a/.github/workflows/copyright.yaml
+++ b/.github/workflows/copyright.yaml
@@ -11,7 +11,7 @@ jobs:
       pull-requests: write
       contents: write
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: FantasticFiasco/action-update-license-year@v3
         with:
           token: ${{ secrets.GITHUB_TOKEN }}