diff --git a/.github/actions/cross-tests/action.yml b/.github/actions/cross-tests/action.yml
new file mode 100644
index 0000000..580676b
--- /dev/null
+++ b/.github/actions/cross-tests/action.yml
@@ -0,0 +1,41 @@
+name: "cross-tests"
+
+inputs:
+  rust:
+    required: true
+  package:
+    required: true
+  target:
+    required: true
+  features:
+    required: true
+
+runs:
+  using: "composite"
+  steps:
+      - uses: actions/checkout@v2
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: ${{ inputs.rust }}
+          target: ${{ inputs.target }}
+          override: true
+      - name: Install precompiled cross
+        run: |
+          export URL=$(curl -s https://api.github.com/repos/cross-rs/cross/releases/latest | \
+            jq -r '.assets[] | select(.name | contains("x86_64-unknown-linux-gnu.tar.gz")) | .browser_download_url')
+          wget -O /tmp/binaries.tar.gz $URL
+          tar -C /tmp -xzf /tmp/binaries.tar.gz
+          mv /tmp/cross ~/.cargo/bin
+        shell: bash
+      - if: ${{ inputs.features != 'NO_FEATURE' }}
+        run: |
+          cd ${{ inputs.package }}
+          cross test --target ${{ inputs.target }} --no-default-features \
+            --features ${{ inputs.features }}
+        shell: bash
+      - if: ${{ inputs.features == 'NO_FEATURE' }}
+        run: |
+          cd ${{ inputs.package }}
+          cross test --target ${{ inputs.target }} --no-default-features
+        shell: bash
diff --git a/.github/dependabot.yml b/.github/dependabot.yml
new file mode 100644
index 0000000..5cde165
--- /dev/null
+++ b/.github/dependabot.yml
@@ -0,0 +1,7 @@
+version: 2
+updates:
+- package-ecosystem: cargo
+  directory: "/"
+  schedule:
+    interval: daily
+  open-pull-requests-limit: 10
diff --git a/.github/workflows/keccak.yml b/.github/workflows/keccak.yml
new file mode 100644
index 0000000..680370d
--- /dev/null
+++ b/.github/workflows/keccak.yml
@@ -0,0 +1,101 @@
+name: keccak
+
+on:
+  pull_request:
+    paths:
+      - ".github/workflows/keccak.yml"
+      - "keccak/**"
+      - "Cargo.*"
+  push:
+    branches: master
+
+defaults:
+  run:
+    working-directory: keccak
+
+env:
+  MSRV: 1.41.0
+  RUSTFLAGS: "-Dwarnings"
+  CARGO_INCREMENTAL: 0
+
+jobs:
+  set-msrv:
+    runs-on: ubuntu-latest
+    outputs:
+      msrv: ${{ steps.msrv.outputs.msrv }}
+    steps:
+      - uses: actions/checkout@v2
+      - id: msrv
+        run: echo "::set-output name=msrv::$(echo $MSRV)"
+
+  build:
+    needs: set-msrv
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        rust:
+          - ${{needs.set-msrv.outputs.msrv}}
+          - stable
+        target:
+          - thumbv7em-none-eabi
+          - wasm32-unknown-unknown
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: ${{ matrix.rust }}
+          target: ${{ matrix.target }}
+          override: true
+      - run: cargo build --no-default-features --target ${{ matrix.target }}
+
+  test:
+    needs: set-msrv
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        rust:
+          - ${{needs.set-msrv.outputs.msrv}}
+          - stable
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: ${{ matrix.rust }}
+          override: true
+      - run: cargo check --all-features
+      - run: cargo test --no-default-features
+      - run: cargo test
+      - run: cargo test --all-features
+
+  # Cross-compiled tests
+  cross:
+    needs: set-msrv
+    strategy:
+      matrix:
+        rust:
+          - ${{needs.set-msrv.outputs.msrv}}
+          - stable
+        target:
+          - i686-unknown-linux-gnu
+          - x86_64-unknown-linux-gnu
+          - aarch64-unknown-linux-gnu
+          - mips-unknown-linux-gnu
+        features:
+          - no_unroll
+          - 'NO_FEATURE'
+
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+      # Cross mounts only current package, i.e. by default it ignores workspace's Cargo.toml
+        working-directory: .
+    steps:
+      - uses: actions/checkout@v2
+      - uses: ./.github/actions/cross-tests
+        with:
+          rust: ${{ matrix.rust }}
+          package: ${{ github.workflow }}
+          target: ${{ matrix.target }}
+          features: ${{ matrix.features }}
diff --git a/.github/workflows/security-audit.yml b/.github/workflows/security-audit.yml
new file mode 100644
index 0000000..0d82d54
--- /dev/null
+++ b/.github/workflows/security-audit.yml
@@ -0,0 +1,24 @@
+name: Security Audit
+on:
+  pull_request:
+    paths: Cargo.lock
+  push:
+    branches: master
+    paths: Cargo.lock
+  schedule:
+    - cron: "0 0 * * *"
+
+jobs:
+  security_audit:
+    name: Security Audit
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v1
+      - name: Cache cargo bin
+        uses: actions/cache@v1
+        with:
+          path: ~/.cargo/bin
+          key: ${{ runner.os }}-cargo-audit-v0.12.0
+      - uses: actions-rs/audit-check@v1
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
diff --git a/.github/workflows/workspace.yml b/.github/workflows/workspace.yml
new file mode 100644
index 0000000..ff7810a
--- /dev/null
+++ b/.github/workflows/workspace.yml
@@ -0,0 +1,43 @@
+name: Workspace
+
+on:
+  pull_request:
+    paths-ignore:
+      - README.md
+  push:
+    branches: master
+    paths-ignore:
+      - README.md
+
+jobs:
+  clippy:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v1
+      - uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+          components: clippy
+          profile: minimal
+          override: true
+      - run: cargo clippy --all -- -D warnings
+
+  rustfmt:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout sources
+        uses: actions/checkout@v1
+
+      - name: Install stable toolchain
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+          components: rustfmt
+          profile: minimal
+          override: true
+
+      - name: Run cargo fmt
+        uses: actions-rs/cargo@v1
+        with:
+          command: fmt
+          args: --all -- --check
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index cda0e8f..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,34 +0,0 @@
-language: rust
-services: docker
-sudo: required
-
-matrix:
-  include:
-    - env: TARGET=i686-unknown-linux-gnu
-      rust: stable
-    - env: TARGET=x86_64-unknown-linux-gnu
-      rust: stable
-    - env: TARGET=x86_64-unknown-linux-gnu
-      rust: 1.15.0
-    - env: TARGET=x86_64-unknown-linux-gnu
-      rust: nightly
-    - env: TARGET=powerpc-unknown-linux-gnu
-      rust: stable
-    - env: TARGET=powerpc64-unknown-linux-gnu
-      rust: stable
-    - env: TARGET=thumbv7em-none-eabi
-      rust: nightly
-      script: ./build_nostd.sh
-      install:
-        - cargo install xargo --force
-        - rustup target install armv7-unknown-linux-gnueabihf
-        - rustup component add rust-src
-
-install:
-  - curl -LSfs https://japaric.github.io/trust/install.sh | sh -s -- --git japaric/cross --force
-  - source ~/.cargo/env || true
-
-script:
-  - cross test --verbose --all --release --target $TARGET
-
-cache: cargo
diff --git a/build_nostd.sh b/build_nostd.sh
deleted file mode 100755
index 2fce0cf..0000000
--- a/build_nostd.sh
+++ /dev/null
@@ -1,21 +0,0 @@
-#!/bin/sh
-# Due to the fact that cargo does not disable default features when we use
-# cargo build --all --no-default-features we have to explicitly iterate over
-# all crates (see https://github.com/rust-lang/cargo/issues/4753 )
-DIRS=`ls -d */`
-TARGET="thumbv7em-none-eabi"
-cargo clean
-
-for dir in $DIRS; do
-    # disable check for aesni, as it requires x86
-    if [ $dir = "target/" ]
-    then
-        continue
-    fi
-    cd $dir
-    xargo build --no-default-features --verbose --target $TARGET || {
-        echo $dir failed
-        exit 1
-    }
-    cd ..
-done
diff --git a/keccak/Cargo.toml b/keccak/Cargo.toml
index 2747543..bef8d52 100644
--- a/keccak/Cargo.toml
+++ b/keccak/Cargo.toml
@@ -11,6 +11,3 @@ categories = ["cryptography", "no-std"]
 
 [features]
 no_unroll = []
-
-[badges]
-travis-ci = { repository = "RustCrypto/sponges" }
diff --git a/keccak/src/lib.rs b/keccak/src/lib.rs
index 48df9d6..1ea00b8 100644
--- a/keccak/src/lib.rs
+++ b/keccak/src/lib.rs
@@ -38,16 +38,17 @@
 #![no_std]
 #![allow(non_upper_case_globals)]
 
+#[rustfmt::skip]
+mod unroll;
+
 const PLEN: usize = 25;
 
 const RHO: [u32; 24] = [
-    1, 3, 6, 10, 15, 21, 28, 36, 45, 55, 2, 14, 27, 41, 56, 8, 25, 43, 62, 18,
-    39, 61, 20, 44,
+    1, 3, 6, 10, 15, 21, 28, 36, 45, 55, 2, 14, 27, 41, 56, 8, 25, 43, 62, 18, 39, 61, 20, 44,
 ];
 
 const PI: [usize; 24] = [
-    10, 7, 11, 17, 18, 3, 5, 16, 8, 21, 24, 4, 15, 23, 19, 13, 12, 2, 20, 14,
-    22, 9, 6, 1,
+    10, 7, 11, 17, 18, 3, 5, 16, 8, 21, 24, 4, 15, 23, 19, 13, 12, 2, 20, 14, 22, 9, 6, 1,
 ];
 
 const RC: [u64; 24] = [
@@ -77,67 +78,12 @@ const RC: [u64; 24] = [
     0x8000000080008008,
 ];
 
-#[cfg(not(feature = "no_unroll"))]
-macro_rules! unroll5 {
-    ($var:ident, $body:block) => {
-        { const $var: usize = 0; $body; }
-        { const $var: usize = 1; $body; }
-        { const $var: usize = 2; $body; }
-        { const $var: usize = 3; $body; }
-        { const $var: usize = 4; $body; }
-    };
-}
-
-#[cfg(feature = "no_unroll")]
-macro_rules! unroll5 {
-    ($var:ident, $body:block) => {
-        for $var in 0..5 $body
-    }
-}
-
-#[cfg(not(feature = "no_unroll"))]
-macro_rules! unroll24 {
-    ($var: ident, $body: block) => {
-        { const $var: usize = 0; $body; }
-        { const $var: usize = 1; $body; }
-        { const $var: usize = 2; $body; }
-        { const $var: usize = 3; $body; }
-        { const $var: usize = 4; $body; }
-        { const $var: usize = 5; $body; }
-        { const $var: usize = 6; $body; }
-        { const $var: usize = 7; $body; }
-        { const $var: usize = 8; $body; }
-        { const $var: usize = 9; $body; }
-        { const $var: usize = 10; $body; }
-        { const $var: usize = 11; $body; }
-        { const $var: usize = 12; $body; }
-        { const $var: usize = 13; $body; }
-        { const $var: usize = 14; $body; }
-        { const $var: usize = 15; $body; }
-        { const $var: usize = 16; $body; }
-        { const $var: usize = 17; $body; }
-        { const $var: usize = 18; $body; }
-        { const $var: usize = 19; $body; }
-        { const $var: usize = 20; $body; }
-        { const $var: usize = 21; $body; }
-        { const $var: usize = 22; $body; }
-        { const $var: usize = 23; $body; }
-    };
-}
-
-#[cfg(feature = "no_unroll")]
-macro_rules! unroll24 {
-    ($var:ident, $body:block) => {
-        for $var in 0..24 $body
-    }
-}
-
 #[allow(unused_assignments)]
 /// Keccak-f[1600] sponge function
 pub fn f1600(a: &mut [u64; PLEN]) {
     // not unrolling this loop results in a much smaller function, plus
     // it positively influences performance due to the smaller load on I-cache
-    for i in 0..24 {
+    for rc in &RC {
         let mut array = [0u64; 5];
 
         // Theta
@@ -179,6 +125,6 @@ pub fn f1600(a: &mut [u64; PLEN]) {
         });
 
         // Iota
-        a[0] ^= RC[i];
+        a[0] ^= rc;
     }
 }
diff --git a/keccak/src/unroll.rs b/keccak/src/unroll.rs
new file mode 100644
index 0000000..58a774f
--- /dev/null
+++ b/keccak/src/unroll.rs
@@ -0,0 +1,58 @@
+#[cfg(not(feature = "no_unroll"))]
+#[macro_export]
+macro_rules! unroll5 {
+    ($var:ident, $body:block) => {
+        { const $var: usize = 0; $body; }
+        { const $var: usize = 1; $body; }
+        { const $var: usize = 2; $body; }
+        { const $var: usize = 3; $body; }
+        { const $var: usize = 4; $body; }
+    };
+}
+
+#[cfg(feature = "no_unroll")]
+#[macro_export]
+macro_rules! unroll5 {
+    ($var:ident, $body:block) => {
+        for $var in 0..5 $body
+    }
+}
+
+#[cfg(not(feature = "no_unroll"))]
+#[macro_export]
+macro_rules! unroll24 {
+    ($var: ident, $body: block) => {
+        { const $var: usize = 0; $body; }
+        { const $var: usize = 1; $body; }
+        { const $var: usize = 2; $body; }
+        { const $var: usize = 3; $body; }
+        { const $var: usize = 4; $body; }
+        { const $var: usize = 5; $body; }
+        { const $var: usize = 6; $body; }
+        { const $var: usize = 7; $body; }
+        { const $var: usize = 8; $body; }
+        { const $var: usize = 9; $body; }
+        { const $var: usize = 10; $body; }
+        { const $var: usize = 11; $body; }
+        { const $var: usize = 12; $body; }
+        { const $var: usize = 13; $body; }
+        { const $var: usize = 14; $body; }
+        { const $var: usize = 15; $body; }
+        { const $var: usize = 16; $body; }
+        { const $var: usize = 17; $body; }
+        { const $var: usize = 18; $body; }
+        { const $var: usize = 19; $body; }
+        { const $var: usize = 20; $body; }
+        { const $var: usize = 21; $body; }
+        { const $var: usize = 22; $body; }
+        { const $var: usize = 23; $body; }
+    };
+}
+
+#[cfg(feature = "no_unroll")]
+#[macro_export]
+macro_rules! unroll24 {
+    ($var:ident, $body:block) => {
+        for $var in 0..24 $body
+    }
+}
diff --git a/rustfmt.toml b/rustfmt.toml
deleted file mode 100644
index 273a22e..0000000
--- a/rustfmt.toml
+++ /dev/null
@@ -1,8 +0,0 @@
-max_width = 80
-force_explicit_abi = false
-fn_single_line = true
-fn_args_density = "Compressed"
-match_block_trailing_comma = true
-normalize_comments = false
-imports_indent = "Block"
-where_single_line = true
\ No newline at end of file