diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index d60cd5a..b060fd5 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -45,12 +45,12 @@ jobs:
     timeout-minutes: 30
     steps:
       - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
-      - uses: dtolnay/rust-toolchain@e2a55d2ffb04f378e9626c28d38b36d230d1e12f # v1
+      - uses: dtolnay/rust-toolchain@683b588c487a69d01f6c6ddf40f036ff682cc2c8 # v1
         with:
           toolchain: ${{ env.PINNED_RUST }}
           components: llvm-tools-preview
       - uses: Swatinem/rust-cache@6323deb102c322ba6fcbdcafc7e3dddab59af2b6 # v2.9.2
-      - uses: taiki-e/install-action@f7e5d7c961414b23f5b25b2da9294395d08513ad # v2.87.26
+      - uses: taiki-e/install-action@1168f6810a3cb30a3514bf5756a3b7f0422c6df8 # v2.87.28
         with:
           tool: cargo-llvm-cov@0.9.1
       - run: cargo llvm-cov --all-targets --all-features --locked --remap-path-prefix --lcov --output-path lcov.info
@@ -72,14 +72,14 @@ jobs:
     timeout-minutes: 15
     steps:
       - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
-      - uses: dtolnay/rust-toolchain@e2a55d2ffb04f378e9626c28d38b36d230d1e12f # v1
+      - uses: dtolnay/rust-toolchain@683b588c487a69d01f6c6ddf40f036ff682cc2c8 # v1
         with:
           toolchain: ${{ env.PINNED_RUST }}
           components: clippy, rustfmt
       - uses: Swatinem/rust-cache@6323deb102c322ba6fcbdcafc7e3dddab59af2b6 # v2.9.2
       - run: cargo fmt --check
       - run: python3 tests/coverage.py
-      - uses: taiki-e/install-action@f7e5d7c961414b23f5b25b2da9294395d08513ad # v2.87.26
+      - uses: taiki-e/install-action@1168f6810a3cb30a3514bf5756a3b7f0422c6df8 # v2.87.28
         with:
           tool: cargo-machete@0.9.1
       - run: cargo machete
@@ -145,7 +145,7 @@ jobs:
     timeout-minutes: 15
     steps:
       - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
-      - uses: dtolnay/rust-toolchain@e2a55d2ffb04f378e9626c28d38b36d230d1e12f # v1
+      - uses: dtolnay/rust-toolchain@683b588c487a69d01f6c6ddf40f036ff682cc2c8 # v1
         with:
           toolchain: 1.88.0
       - uses: Swatinem/rust-cache@6323deb102c322ba6fcbdcafc7e3dddab59af2b6 # v2.9.2
@@ -158,7 +158,7 @@ jobs:
       - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
       # cargo audit itself rather than rustsec/audit-check, whose releases
       # still run on Node.js 20. Pinned like the lint toolchain.
-      - uses: taiki-e/install-action@f7e5d7c961414b23f5b25b2da9294395d08513ad # v2.87.26
+      - uses: taiki-e/install-action@1168f6810a3cb30a3514bf5756a3b7f0422c6df8 # v2.87.28
         with:
           tool: cargo-audit@0.22.2
       # Unsound and yanked crates fail as vulnerabilities do; ignore a specific
@@ -201,7 +201,7 @@ jobs:
       - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
           persist-credentials: false
-      - uses: dtolnay/rust-toolchain@e2a55d2ffb04f378e9626c28d38b36d230d1e12f # v1
+      - uses: dtolnay/rust-toolchain@683b588c487a69d01f6c6ddf40f036ff682cc2c8 # v1
         with:
           toolchain: ${{ env.PINNED_RUST }}
           targets: ${{ matrix.target }}