diff --git a/.github/workflows/benches.yml b/.github/workflows/benches.yml
index 2dfe9e00..53ac563c 100644
--- a/.github/workflows/benches.yml
+++ b/.github/workflows/benches.yml
@@ -20,7 +20,7 @@ jobs:
     if: false # TODO: temp disabled due to unpublished prerelease dependencies
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: RustCrypto/actions/cargo-cache@master
       - uses: dtolnay/rust-toolchain@master
         with:
diff --git a/.github/workflows/chacha20.yml b/.github/workflows/chacha20.yml
index d79583e7..40fc6810 100644
--- a/.github/workflows/chacha20.yml
+++ b/.github/workflows/chacha20.yml
@@ -33,7 +33,7 @@ jobs:
           - thumbv7em-none-eabi
           - wasm32-unknown-unknown
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: RustCrypto/actions/cargo-cache@master
       - uses: dtolnay/rust-toolchain@master
         with:
@@ -68,7 +68,7 @@ jobs:
           - target: x86_64-unknown-linux-gnu
             rust: stable
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: RustCrypto/actions/cargo-cache@master
       - uses: dtolnay/rust-toolchain@master
         with:
@@ -101,7 +101,7 @@ jobs:
           - target: x86_64-unknown-linux-gnu
             rust: stable
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: RustCrypto/actions/cargo-cache@master
       - uses: dtolnay/rust-toolchain@master
         with:
@@ -134,7 +134,7 @@ jobs:
           - target: x86_64-unknown-linux-gnu
             rust: stable
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: RustCrypto/actions/cargo-cache@master
       - uses: dtolnay/rust-toolchain@master
         with:
@@ -167,7 +167,7 @@ jobs:
           - target: x86_64-unknown-linux-gnu
             rust: stable
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: RustCrypto/actions/cargo-cache@master
       - uses: dtolnay/rust-toolchain@master
         with:
@@ -201,7 +201,7 @@ jobs:
         # Cross mounts only current package, i.e. by default it ignores workspace's Cargo.toml
         working-directory: .
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: RustCrypto/actions/cargo-cache@master
       - run: ${{ matrix.deps }}
       - uses: dtolnay/rust-toolchain@master
diff --git a/.github/workflows/hc-256.yml b/.github/workflows/hc-256.yml
index 971d8815..e33bd9dc 100644
--- a/.github/workflows/hc-256.yml
+++ b/.github/workflows/hc-256.yml
@@ -28,7 +28,7 @@ jobs:
           - thumbv7em-none-eabi
           - wasm32-unknown-unknown
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: RustCrypto/actions/cargo-cache@master
       - uses: dtolnay/rust-toolchain@master
         with:
@@ -52,7 +52,7 @@ jobs:
           - 1.85.0 # MSRV
           - stable
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: RustCrypto/actions/cargo-cache@master
       - uses: dtolnay/rust-toolchain@master
         with:
diff --git a/.github/workflows/rabbit.yml b/.github/workflows/rabbit.yml
index 92710723..abdaf003 100644
--- a/.github/workflows/rabbit.yml
+++ b/.github/workflows/rabbit.yml
@@ -28,7 +28,7 @@ jobs:
           - thumbv7em-none-eabi
           - wasm32-unknown-unknown
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: RustCrypto/actions/cargo-cache@master
       - uses: dtolnay/rust-toolchain@master
         with:
@@ -51,7 +51,7 @@ jobs:
           - 1.85.0 # MSRV
           - stable
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: RustCrypto/actions/cargo-cache@master
       - uses: dtolnay/rust-toolchain@master
         with:
diff --git a/.github/workflows/rc4.yml b/.github/workflows/rc4.yml
index 6b841a62..50862e9d 100644
--- a/.github/workflows/rc4.yml
+++ b/.github/workflows/rc4.yml
@@ -28,7 +28,7 @@ jobs:
           - thumbv7em-none-eabi
           - wasm32-unknown-unknown
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: RustCrypto/actions/cargo-cache@master
       - uses: dtolnay/rust-toolchain@master
         with:
@@ -51,7 +51,7 @@ jobs:
           - 1.85.0 # MSRV
           - stable
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: RustCrypto/actions/cargo-cache@master
       - uses: dtolnay/rust-toolchain@master
         with:
diff --git a/.github/workflows/salsa20.yml b/.github/workflows/salsa20.yml
index 6503303f..01dde9f5 100644
--- a/.github/workflows/salsa20.yml
+++ b/.github/workflows/salsa20.yml
@@ -28,7 +28,7 @@ jobs:
           - thumbv7em-none-eabi
           - wasm32-unknown-unknown
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: RustCrypto/actions/cargo-cache@master
       - uses: dtolnay/rust-toolchain@master
         with:
@@ -51,7 +51,7 @@ jobs:
           - 1.85.0 # MSRV
           - stable
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: RustCrypto/actions/cargo-cache@master
       - uses: dtolnay/rust-toolchain@master
         with:
diff --git a/.github/workflows/workspace.yml b/.github/workflows/workspace.yml
index dd65313f..eb22488f 100644
--- a/.github/workflows/workspace.yml
+++ b/.github/workflows/workspace.yml
@@ -13,7 +13,7 @@ jobs:
   clippy:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: RustCrypto/actions/cargo-cache@master
       - uses: dtolnay/rust-toolchain@master
         with:
@@ -25,7 +25,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout sources
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - name: Install stable toolchain
         uses: dtolnay/rust-toolchain@master
         with: