diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
index a90d5856a..0244a593f 100644
--- a/.github/workflows/deploy.yml
+++ b/.github/workflows/deploy.yml
@@ -9,7 +9,7 @@ jobs:
   deploy:
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - run: cargo install mdbook --version 0.4.44
       - name: Patch sample Cargo.toml versions
         run: |
diff --git a/.github/workflows/release-plz.yml b/.github/workflows/release-plz.yml
index ce82bed94..37669e3aa 100644
--- a/.github/workflows/release-plz.yml
+++ b/.github/workflows/release-plz.yml
@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           fetch-depth: 0
       - name: Install Rust toolchain
diff --git a/.github/workflows/test-timely-master.yml b/.github/workflows/test-timely-master.yml
index cdc04866a..4c404ec53 100644
--- a/.github/workflows/test-timely-master.yml
+++ b/.github/workflows/test-timely-master.yml
@@ -15,7 +15,7 @@ jobs:
     name: cargo test on ${{ matrix.os }}, rust ${{ matrix.toolchain }}
     runs-on: ${{ matrix.os }}-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: actions-rust-lang/setup-rust-toolchain@v1
         with:
           toolchain: ${{ matrix.toolchain }}
@@ -44,7 +44,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       # We need to checkout the repository to access the issue template
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: JasonEtco/create-an-issue@v2
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 64a9f1ae2..0e580d05d 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -19,7 +19,7 @@ jobs:
     name: cargo test on ${{ matrix.os }}, rust ${{ matrix.toolchain }}
     runs-on: ${{ matrix.os }}-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: actions-rust-lang/setup-rust-toolchain@v1
         with:
           toolchain: ${{ matrix.toolchain }}
@@ -31,7 +31,7 @@ jobs:
     name: test mdBook
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: actions-rust-lang/setup-rust-toolchain@v1
         # rustdoc doesn't build dependencies, so it needs to run after `cargo build`,
         # but its dependency search gets confused if there are multiple copies of any