diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 32fb0709..e62d7bca 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -12,7 +12,7 @@ jobs:
       NODE_OPTIONS: --max-old-space-size=4096
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Setup Node.js
         uses: actions/setup-node@v4
diff --git a/.github/workflows/codespell.yml b/.github/workflows/codespell.yml
index 5737a6bc..ce03a430 100644
--- a/.github/workflows/codespell.yml
+++ b/.github/workflows/codespell.yml
@@ -18,7 +18,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
       - name: Annotate locations with typos
         uses: codespell-project/codespell-problem-matcher@b80729f885d32f78a716c2f107b4db1025001c42 # v1
       - name: Codespell
diff --git a/.github/workflows/codex.yml b/.github/workflows/codex.yml
index 6ca0d57f..cb312755 100644
--- a/.github/workflows/codex.yml
+++ b/.github/workflows/codex.yml
@@ -37,7 +37,7 @@ jobs:
       #    Codex is not going to run.
 
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - uses: dtolnay/rust-toolchain@1.88
         with:
diff --git a/.github/workflows/rust-ci.yml b/.github/workflows/rust-ci.yml
index fd8340a0..29733a46 100644
--- a/.github/workflows/rust-ci.yml
+++ b/.github/workflows/rust-ci.yml
@@ -17,7 +17,7 @@ jobs:
       codex: ${{ steps.detect.outputs.codex }}
       workflows: ${{ steps.detect.outputs.workflows }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           fetch-depth: 0
       - name: Detect changed paths (no external action)
@@ -56,7 +56,7 @@ jobs:
       run:
         working-directory: codex-rs
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: dtolnay/rust-toolchain@1.88
         with:
           components: rustfmt
@@ -111,7 +111,7 @@ jobs:
             profile: release
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: dtolnay/rust-toolchain@1.88
         with:
           targets: ${{ matrix.target }}
diff --git a/.github/workflows/rust-release.yml b/.github/workflows/rust-release.yml
index c30ffdf6..c00a7a5e 100644
--- a/.github/workflows/rust-release.yml
+++ b/.github/workflows/rust-release.yml
@@ -19,7 +19,7 @@ jobs:
   tag-check:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - name: Validate tag matches Cargo.toml version
         shell: bash
@@ -74,7 +74,7 @@ jobs:
             target: x86_64-pc-windows-msvc
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: dtolnay/rust-toolchain@1.88
         with:
           targets: ${{ matrix.target }}
@@ -163,7 +163,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - uses: actions/download-artifact@v4
         with: