diff --git a/.github/workflows/benchmark-elaborate.yml b/.github/workflows/benchmark-elaborate.yml
index 295badd..1b53c37 100644
--- a/.github/workflows/benchmark-elaborate.yml
+++ b/.github/workflows/benchmark-elaborate.yml
@@ -16,7 +16,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Setup Rust toolchain
         uses: dtolnay/rust-toolchain@stable
diff --git a/.github/workflows/benchmark.yml b/.github/workflows/benchmark.yml
index a9e8b0f..7421421 100644
--- a/.github/workflows/benchmark.yml
+++ b/.github/workflows/benchmark.yml
@@ -13,7 +13,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Setup Rust toolchain
         uses: dtolnay/rust-toolchain@stable
diff --git a/.github/workflows/build-and-test.yml b/.github/workflows/build-and-test.yml
index 9a68d67..7ced578 100644
--- a/.github/workflows/build-and-test.yml
+++ b/.github/workflows/build-and-test.yml
@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     name: cargo semver-checks
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: obi1kenobi/cargo-semver-checks-action@v2
         with:
           # Check default feature set, plus elgamal3 and legacy.
@@ -34,7 +34,7 @@ jobs:
 
     name: cargo test (${{ matrix.name }})
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: actions-rust-lang/setup-rust-toolchain@v1
       - uses: Swatinem/rust-cache@v2
       - run: cargo test --features "${{ matrix.features }}"
@@ -53,7 +53,7 @@ jobs:
 
     name: wasm-pack build (${{ matrix.target }}, ${{ matrix.features }})
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: actions-rust-lang/setup-rust-toolchain@v1
       - uses: Swatinem/rust-cache@v2
       - run: cargo install wasm-pack
diff --git a/.github/workflows/check-version.yml b/.github/workflows/check-version.yml
index 71eb29d..0ae3092 100644
--- a/.github/workflows/check-version.yml
+++ b/.github/workflows/check-version.yml
@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     name: cargo semver-checks
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: obi1kenobi/cargo-semver-checks-action@v2
         with:
           # Check default feature set, plus elgamal3 and legacy.
@@ -22,7 +22,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Setup Node.js
         uses: actions/setup-node@v4
diff --git a/.github/workflows/lint-and-test.yml b/.github/workflows/lint-and-test.yml
index 2cbab55..565e876 100644
--- a/.github/workflows/lint-and-test.yml
+++ b/.github/workflows/lint-and-test.yml
@@ -32,7 +32,7 @@ jobs:
             name: "default+wasm+elgamal3"
     name: cargo clippy (${{ matrix.name }})
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: actions-rust-lang/setup-rust-toolchain@v1
       - uses: Swatinem/rust-cache@v2
       - run: cargo clippy --all-targets --features "${{ matrix.features }}" -- -D warnings
@@ -41,7 +41,7 @@ jobs:
     runs-on: ubuntu-latest
     name: cargo fmt
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: actions-rust-lang/setup-rust-toolchain@v1
       - run: cargo fmt -- --check
 
@@ -71,7 +71,7 @@ jobs:
             name: "default+wasm+elgamal3"
     name: cargo test (${{ matrix.name }})
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: actions-rust-lang/setup-rust-toolchain@v1
       - uses: Swatinem/rust-cache@v2
 
@@ -82,7 +82,7 @@ jobs:
     runs-on: ubuntu-latest
     name: test python bindings
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: actions-rust-lang/setup-rust-toolchain@v1
       - uses: Swatinem/rust-cache@v2
       - uses: actions/setup-python@v5
@@ -104,7 +104,7 @@ jobs:
     runs-on: ubuntu-latest
     name: test wasm bindings
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: actions-rust-lang/setup-rust-toolchain@v1
       - uses: Swatinem/rust-cache@v2
       - uses: actions/setup-node@v4
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index 31f161f..4c0da28 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     name: cargo semver-checks
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: obi1kenobi/cargo-semver-checks-action@v2
         with:
           # Check default feature set, plus elgamal3 and legacy.
@@ -26,7 +26,7 @@ jobs:
 
     name: Build and publish Rust crate to crates.io
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: actions-rust-lang/setup-rust-toolchain@v1
       - uses: Swatinem/rust-cache@v2
       - uses: rust-lang/crates-io-auth-action@v1
@@ -44,7 +44,7 @@ jobs:
 
     name: Build and publish WASM package to NPM
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: actions-rust-lang/setup-rust-toolchain@v1
       - uses: Swatinem/rust-cache@v2
       - uses: actions/setup-node@v4
@@ -65,7 +65,7 @@ jobs:
 
     name: Build and publish Python package to PyPI
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - name: Build wheels and sdist
         uses: PyO3/maturin-action@v1
         with: