diff --git a/.github/workflows/ecdsa.yml b/.github/workflows/ecdsa.yml
new file mode 100644
index 0000000..38788fa
--- /dev/null
+++ b/.github/workflows/ecdsa.yml
@@ -0,0 +1,111 @@
+name: ecdsa
+on:
+  pull_request:
+    paths:
+      - "ecdsa/**"
+      - "Cargo.*"
+  push:
+    branches: master
+    paths:
+      - "ecdsa/**"
+      - "Cargo.*"
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        target:
+          - thumbv7em-none-eabi
+          - wasm32-unknown-unknown
+        toolchain:
+          - 1.40.0 # MSRV
+          - stable
+    steps:
+      - name: Checkout sources
+        uses: actions/checkout@v1
+
+      - name: Cache cargo registry
+        uses: actions/cache@v1
+        with:
+          path: ~/.cargo/registry
+          key: ${{ runner.os }}-cargo-registry-${{ hashFiles('Cargo.lock') }}
+
+      - name: Cache cargo index
+        uses: actions/cache@v1
+        with:
+          path: ~/.cargo/git
+          key: ${{ runner.os }}-cargo-index-${{ hashFiles('Cargo.lock') }}
+
+      - name: Cache cargo build
+        uses: actions/cache@v1
+        with:
+          path: target
+          key: ${{ runner.os }}-rust-${{ matrix.toolchain }}-${{ matrix.target }}-cargo-build-target-${{ hashFiles('Cargo.lock') }}
+
+      - name: Install toolchain
+        uses: actions-rs/toolchain@v1
+        with:
+          target: ${{ matrix.target }}
+          toolchain: ${{ matrix.toolchain }}
+          override: true
+
+      - name: Run cargo build --no-default-features
+        working-directory: ecdsa
+        env:
+          CARGO_INCREMENTAL: 0
+          RUSTFLAGS: -D warnings
+        run: cargo build --no-default-features --release --target ${{ matrix.target }}
+
+  test:
+    strategy:
+      matrix:
+        platform:
+          - ubuntu-latest
+          - macos-latest
+          - windows-latest
+        toolchain:
+          - 1.40.0 # MSRV
+          - stable
+    runs-on: ${{ matrix.platform }}
+    steps:
+      - name: Checkout sources
+        uses: actions/checkout@v1
+
+      - name: Cache cargo registry
+        uses: actions/cache@v1
+        with:
+          path: ~/.cargo/registry
+          key: ${{ runner.os }}-cargo-registry-${{ hashFiles('Cargo.lock') }}
+
+      - name: Cache cargo index
+        uses: actions/cache@v1
+        with:
+          path: ~/.cargo/git
+          key: ${{ runner.os }}-cargo-index-${{ hashFiles('Cargo.lock') }}
+
+      - name: Cache cargo build
+        uses: actions/cache@v1
+        with:
+          path: target
+          key: ${{ runner.os }}-rust-${{ matrix.toolchain }}-cargo-build-target-${{ hashFiles('Cargo.lock') }}
+
+      - name: Install toolchain
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: ${{ matrix.toolchain }}
+          override: true
+
+      - name: Run cargo test --lib
+        working-directory: ecdsa
+        env:
+          CARGO_INCREMENTAL: 0
+          RUSTFLAGS: -D warnings
+        run: cargo test --lib --release
+
+      - name: Run cargo test --all-features
+        working-directory: ecdsa
+        env:
+          CARGO_INCREMENTAL: 0
+          RUSTFLAGS: -D warnings
+        run: cargo test --all-features --release
diff --git a/.github/workflows/ed25519.yml b/.github/workflows/ed25519.yml
new file mode 100644
index 0000000..e6231f9
--- /dev/null
+++ b/.github/workflows/ed25519.yml
@@ -0,0 +1,111 @@
+name: ed25519
+on:
+  pull_request:
+    paths:
+      - "ed25519/**"
+      - "Cargo.*"
+  push:
+    branches: master
+    paths:
+      - "ed25519/**"
+      - "Cargo.*"
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        target:
+          - thumbv7em-none-eabi
+          - wasm32-unknown-unknown
+        toolchain:
+          - 1.40.0 # MSRV
+          - stable
+    steps:
+      - name: Checkout sources
+        uses: actions/checkout@v1
+
+      - name: Cache cargo registry
+        uses: actions/cache@v1
+        with:
+          path: ~/.cargo/registry
+          key: ${{ runner.os }}-cargo-registry-${{ hashFiles('Cargo.lock') }}
+
+      - name: Cache cargo index
+        uses: actions/cache@v1
+        with:
+          path: ~/.cargo/git
+          key: ${{ runner.os }}-cargo-index-${{ hashFiles('Cargo.lock') }}
+
+      - name: Cache cargo build
+        uses: actions/cache@v1
+        with:
+          path: target
+          key: ${{ runner.os }}-rust-${{ matrix.toolchain }}-${{ matrix.target }}-cargo-build-target-${{ hashFiles('Cargo.lock') }}
+
+      - name: Install toolchain
+        uses: actions-rs/toolchain@v1
+        with:
+          target: ${{ matrix.target }}
+          toolchain: ${{ matrix.toolchain }}
+          override: true
+
+      - name: Run cargo build --no-default-features
+        working-directory: ed25519
+        env:
+          CARGO_INCREMENTAL: 0
+          RUSTFLAGS: -D warnings
+        run: cargo build --no-default-features --release --target ${{ matrix.target }}
+
+  test:
+    strategy:
+      matrix:
+        platform:
+          - ubuntu-latest
+          - macos-latest
+          - windows-latest
+        toolchain:
+          - 1.40.0 # MSRV
+          - stable
+    runs-on: ${{ matrix.platform }}
+    steps:
+      - name: Checkout sources
+        uses: actions/checkout@v1
+
+      - name: Cache cargo registry
+        uses: actions/cache@v1
+        with:
+          path: ~/.cargo/registry
+          key: ${{ runner.os }}-cargo-registry-${{ hashFiles('Cargo.lock') }}
+
+      - name: Cache cargo index
+        uses: actions/cache@v1
+        with:
+          path: ~/.cargo/git
+          key: ${{ runner.os }}-cargo-index-${{ hashFiles('Cargo.lock') }}
+
+      - name: Cache cargo build
+        uses: actions/cache@v1
+        with:
+          path: target
+          key: ${{ runner.os }}-rust-${{ matrix.toolchain }}-cargo-build-target-${{ hashFiles('Cargo.lock') }}
+
+      - name: Install toolchain
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: ${{ matrix.toolchain }}
+          override: true
+
+      - name: Run cargo test --lib
+        working-directory: ed25519
+        env:
+          CARGO_INCREMENTAL: 0
+          RUSTFLAGS: -D warnings
+        run: cargo test --lib --release
+
+      - name: Run cargo test --all-features
+        working-directory: ed25519
+        env:
+          CARGO_INCREMENTAL: 0
+          RUSTFLAGS: -D warnings
+        run: cargo test --all-features --release
diff --git a/.github/workflows/security-audit.yml b/.github/workflows/security-audit.yml
new file mode 100644
index 0000000..373efc4
--- /dev/null
+++ b/.github/workflows/security-audit.yml
@@ -0,0 +1,24 @@
+name: Security Audit
+on:
+  pull_request:
+    paths: Cargo.lock
+  push:
+    branches: develop
+    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-v0.11.2
+      - 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..e090d25
--- /dev/null
+++ b/.github/workflows/workspace.yml
@@ -0,0 +1,88 @@
+name: Workspace
+on:
+  pull_request:
+    paths-ignore:
+      - README.md
+  push:
+    branches: master
+    paths-ignore:
+      - README.md
+
+jobs:
+  rustfmt:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout sources
+        uses: actions/checkout@v1
+
+      - name: Install stable toolchain
+        uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: stable
+          components: rustfmt
+
+      - name: Run cargo fmt
+        uses: actions-rs/cargo@v1
+        with:
+          command: fmt
+          args: --all -- --check
+  clippy:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v1
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: stable
+          components: clippy
+      - run: cargo clippy --all-features -- -D warnings
+
+  codecov:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+
+      - name: Cache cargo registry
+        uses: actions/cache@v1
+        with:
+          path: ~/.cargo/registry
+          key: ${{ runner.os }}-cargo-registry-${{ hashFiles('Cargo.lock') }}
+
+      - name: Cache cargo index
+        uses: actions/cache@v1
+        with:
+          path: ~/.cargo/git
+          key: ${{ runner.os }}-cargo-index-${{ hashFiles('Cargo.lock') }}
+
+      - name: Cache cargo build
+        uses: actions/cache@v1
+        with:
+          path: target
+          key: ${{ runner.os }}-coverage-cargo-build-target-${{ hashFiles('Cargo.lock') }}
+
+      - name: Install stable toolchain
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+          override: true
+
+      - name: Run cargo-tarpaulin
+        uses: actions-rs/tarpaulin@v0.1
+        env:
+          CARGO_INCREMENTAL: 0
+        with:
+          version: 0.11.0
+          args: --all --exclude armistice_usbarmory -- --test-threads 1
+
+      - name: Upload to codecov.io
+        uses: codecov/codecov-action@v1.0.2
+        with:
+          token: ${{secrets.CODECOV_TOKEN}}
+
+      - name: Archive code coverage results
+        uses: actions/upload-artifact@v1
+        with:
+          name: code-coverage-report
+          path: cobertura.xml
diff --git a/.gitignore b/.gitignore
index 4c1bf0e..c6262ea 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,2 @@
-Cargo.lock
 target
-*.sw*
+*.swp
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index d2b8355..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,44 +0,0 @@
-language: rust
-cache: cargo
-
-rust:
-  - 1.37.0
-  - stable
-  - beta
-  - nightly
-
-env:
-  global:
-    - RUSTFLAGS="-D warnings"
-
-script:
-  - cargo test --verbose --release
-  - cargo test --verbose --all-features --release
-
-matrix:
-  fast_finish: true
-  allow_failures:
-    - rust: nightly
-  include:
-    - name: "Rust: stable (thumbv7em-none-eabihf)"
-      rust: stable
-      install: rustup target add thumbv7em-none-eabi
-      script: ./build_nostd.sh
-    - name: "Rust: stable (wasm32-unknown-unknown)"
-      rust: stable
-      install: rustup target add wasm32-unknown-unknown
-      script: ./build_wasm.sh
-    - name: rustfmt
-      rust: stable
-      install: rustup component add rustfmt
-      script: cargo fmt --all -- --check
-    - name: clippy
-      install: rustup component add clippy
-      rust: stable
-      script: cargo clippy --all
-    - name: docs
-      script: cargo doc --all --no-deps
-
-branches:
-  only:
-    - master
diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 0000000..b9277f7
--- /dev/null
+++ b/Cargo.lock
@@ -0,0 +1,198 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "block-buffer"
+version = "0.7.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c0940dc441f31689269e10ac70eb1002a3a1d3ad1390e030043662eb7fe4688b"
+dependencies = [
+ "block-padding",
+ "byte-tools",
+ "byteorder",
+ "generic-array",
+]
+
+[[package]]
+name = "block-padding"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fa79dedbb091f449f1f39e53edf88d5dbe95f895dae6135a8d7b881fb5af73f5"
+dependencies = [
+ "byte-tools",
+]
+
+[[package]]
+name = "byte-tools"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e3b5ca7a04898ad4bcd41c90c5285445ff5b791899bb1b0abdd2a2aa791211d7"
+
+[[package]]
+name = "byteorder"
+version = "1.3.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "08c48aae112d48ed9f069b33538ea9e3e90aa263cfa3d1c24309612b1f7472de"
+
+[[package]]
+name = "cfg-if"
+version = "0.1.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4785bdd1c96b2a846b2bd7cc02e86b6b3dbf14e7e53446c4f54c92a361040822"
+
+[[package]]
+name = "digest"
+version = "0.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f3d0c8c8752312f9713efd397ff63acb9f85585afbf179282e720e7704954dd5"
+dependencies = [
+ "generic-array",
+]
+
+[[package]]
+name = "ecdsa"
+version = "0.5.0-pre"
+dependencies = [
+ "elliptic-curve",
+ "generic-array",
+ "k256",
+ "p256",
+ "p384",
+ "sha2",
+ "signature",
+]
+
+[[package]]
+name = "ed25519"
+version = "1.0.0-pre.2"
+dependencies = [
+ "serde",
+ "signature",
+]
+
+[[package]]
+name = "elliptic-curve"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "01f69be7d1feb7a7a04f158aaf32c7deaa7604e9bd58145525e536438c4e5096"
+dependencies = [
+ "generic-array",
+ "getrandom",
+ "subtle",
+ "zeroize",
+]
+
+[[package]]
+name = "fake-simd"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e88a8acf291dafb59c2d96e8f59828f3838bb1a70398823ade51a84de6a6deed"
+
+[[package]]
+name = "generic-array"
+version = "0.12.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c68f0274ae0e023facc3c97b2e00f076be70e254bc851d972503b328db79b2ec"
+dependencies = [
+ "typenum",
+]
+
+[[package]]
+name = "getrandom"
+version = "0.1.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7abc8dd8451921606d809ba32e95b6111925cd2906060d2dcc29c070220503eb"
+dependencies = [
+ "cfg-if",
+ "libc",
+ "wasi",
+]
+
+[[package]]
+name = "k256"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4407bc616f76afb6bccd8a813b86fe622752b15b43c5e60fec94d21af2393a72"
+dependencies = [
+ "elliptic-curve",
+]
+
+[[package]]
+name = "libc"
+version = "0.2.67"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "eb147597cdf94ed43ab7a9038716637d2d1bf2bc571da995d0028dec06bd3018"
+
+[[package]]
+name = "opaque-debug"
+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2839e79665f131bdb5782e51f2c6c9599c133c6098982a54c794358bf432529c"
+
+[[package]]
+name = "p256"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "812a058a5afc96a52a8ab6e250325d025254ff030ff737dc5b62576e4e604c42"
+dependencies = [
+ "elliptic-curve",
+]
+
+[[package]]
+name = "p384"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3aee0d9bdeedaea6cdd47f9281a9f8e1037d3037088b70e2af13c64ce65608ec"
+dependencies = [
+ "elliptic-curve",
+]
+
+[[package]]
+name = "serde"
+version = "1.0.104"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "414115f25f818d7dfccec8ee535d76949ae78584fc4f79a6f45a904bf8ab4449"
+
+[[package]]
+name = "sha2"
+version = "0.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "27044adfd2e1f077f649f59deb9490d3941d674002f7d062870a60ebe9bd47a0"
+dependencies = [
+ "block-buffer",
+ "digest",
+ "fake-simd",
+ "opaque-debug",
+]
+
+[[package]]
+name = "signature"
+version = "1.0.0-pre.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7633506bfb9bb78fd228f8fa51d46802fc72fe642e707b42a64f57b07eaf8fb8"
+dependencies = [
+ "digest",
+]
+
+[[package]]
+name = "subtle"
+version = "2.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7c65d530b10ccaeac294f349038a597e435b18fb456aadd0840a623f83b9e941"
+
+[[package]]
+name = "typenum"
+version = "1.11.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6d2783fe2d6b8c1101136184eb41be8b1ad379e4657050b8aaff0c79ee7575f9"
+
+[[package]]
+name = "wasi"
+version = "0.9.0+wasi-snapshot-preview1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cccddf32554fecc6acb585f82a32a72e28b48f8c4c1883ddfeeeaa96f7d8e519"
+
+[[package]]
+name = "zeroize"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3cbac2ed2ba24cc90f5e06485ac8c7c1e5449fe8911aef4d8877218af021a5b8"
diff --git a/README.md b/README.md
index daad745..0c556fe 100644
--- a/README.md
+++ b/README.md
@@ -1,8 +1,4 @@
-# RustCrypto: signatures
-
-[![Build Status][build-image]][build-link]
-[![Dependency Status][deps-image]][deps-link]
-![Rust Version][rustc-image]
+# RustCrypto: signatures [![Dependency Status][deps-image]][deps-link] ![Rust Version][rustc-image]
 
 Support for [digital signatures][1], which provide authentication of data using
 public-key cryptography.
@@ -22,7 +18,7 @@ and can be easily used for bare-metal or lightweight WebAssembly programming.
 
 ## Minimum Supported Rust Version
 
-All crates in this repository support Rust **1.37** or higher. In future minimum
+All crates in this repository support Rust **1.40** or higher. In future minimum
 supported Rust version can be changed, but it will be done with the minor
 version bump.
 
@@ -48,11 +44,9 @@ dual licensed as above, without any additional terms or conditions.
 
 [//]: # (badges)
 
-[build-image]: https://travis-ci.org/RustCrypto/signatures.svg?branch=master
-[build-link]: https://travis-ci.org/RustCrypto/signatures
 [deps-image]: https://deps.rs/repo/github/RustCrypto/signatures/status.svg
 [deps-link]: https://deps.rs/repo/github/RustCrypto/signatures
-[rustc-image]: https://img.shields.io/badge/rustc-1.37+-blue.svg
+[rustc-image]: https://img.shields.io/badge/rustc-1.40+-blue.svg
 
 [//]: # (general links)
 
diff --git a/build_nostd.sh b/build_nostd.sh
deleted file mode 100755
index 4483949..0000000
--- a/build_nostd.sh
+++ /dev/null
@@ -1,22 +0,0 @@
-#!/bin/sh
-
-set -eux
-
-# 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"
-
-for dir in $DIRS; do
-    if [ $dir = "target/" ]
-    then
-        continue
-    fi
-    cd $dir
-    cargo build --no-default-features --verbose --target $TARGET --release || {
-        echo $dir failed
-        exit 1
-    }
-    cd -
-done
diff --git a/build_wasm.sh b/build_wasm.sh
deleted file mode 100755
index 811d7ad..0000000
--- a/build_wasm.sh
+++ /dev/null
@@ -1,22 +0,0 @@
-#!/bin/sh
-
-set -eux
-
-# 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="wasm32-unknown-unknown"
-
-for dir in $DIRS; do
-    if [ $dir = "target/" ]
-    then
-        continue
-    fi
-    cd $dir
-    cargo build --verbose --target $TARGET --release || {
-        echo $dir failed
-        exit 1
-    }
-    cd -
-done
diff --git a/ecdsa/README.md b/ecdsa/README.md
index 140fd91..a93bc57 100644
--- a/ecdsa/README.md
+++ b/ecdsa/README.md
@@ -24,7 +24,7 @@ ECDSA implementations, including HSMs or Cloud KMS services.
 
 ## Requirements
 
-- Rust **1.37+**
+- Rust **1.40+**
 
 ## License
 
@@ -48,9 +48,9 @@ dual licensed as above, without any additional terms or conditions.
 [docs-image]: https://docs.rs/ecdsa/badge.svg
 [docs-link]: https://docs.rs/ecdsa/
 [license-image]: https://img.shields.io/badge/license-Apache2.0/MIT-blue.svg
-[rustc-image]: https://img.shields.io/badge/rustc-1.37+-blue.svg
-[build-image]: https://travis-ci.org/RustCrypto/signatures.svg?branch=master
-[build-link]: https://travis-ci.org/RustCrypto/signatures
+[rustc-image]: https://img.shields.io/badge/rustc-1.40+-blue.svg
+[build-image]: https://github.com/RustCrypto/signatures/workflows/ecdsa/badge.svg?branch=master&event=push
+[build-link]: https://github.com/RustCrypto/signatures/actions
 
 [//]: # (general links)
 
diff --git a/ed25519/README.md b/ed25519/README.md
index 530a350..9076be0 100644
--- a/ed25519/README.md
+++ b/ed25519/README.md
@@ -23,7 +23,7 @@ Ed25519 implementations, including HSMs or Cloud KMS services.
 
 ## Requirements
 
-- Rust **1.37+**
+- Rust **1.40+**
 
 ## License
 
@@ -47,9 +47,9 @@ dual licensed as above, without any additional terms or conditions.
 [docs-image]: https://docs.rs/ed25519/badge.svg
 [docs-link]: https://docs.rs/ed25519/
 [license-image]: https://img.shields.io/badge/license-Apache2.0/MIT-blue.svg
-[rustc-image]: https://img.shields.io/badge/rustc-1.37+-blue.svg
-[build-image]: https://travis-ci.org/RustCrypto/signatures.svg?branch=master
-[build-link]: https://travis-ci.org/RustCrypto/signatures
+[rustc-image]: https://img.shields.io/badge/rustc-1.40+-blue.svg
+[build-image]: https://github.com/RustCrypto/signatures/workflows/ed25519/badge.svg?branch=master&event=push
+[build-link]: https://github.com/RustCrypto/signatures/actions
 
 [//]: # (general links)
 
diff --git a/ed25519/src/lib.rs b/ed25519/src/lib.rs
index d52d99e..bdae794 100644
--- a/ed25519/src/lib.rs
+++ b/ed25519/src/lib.rs
@@ -65,15 +65,16 @@ impl AsRef<[u8]> for Signature {
 
 // can't derive `Debug`, `PartialEq`, or `Eq` below because core array types
 // only have  trait implementations for lengths 0..=32
-// TODO(tarcieri): derive `PartialEq` and `Eq` after const generics are available
 impl Debug for Signature {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         write!(f, "ed25519::Signature({:?})", &self.0[..])
     }
 }
 
+// TODO(tarcieri): derive `Eq` after const generics are available
 impl Eq for Signature {}
 
+// TODO(tarcieri): derive `PartialEq` after const generics are available
 impl PartialEq for Signature {
     fn eq(&self, other: &Self) -> bool {
         self.as_ref().eq(other.as_ref())
@@ -140,8 +141,8 @@ impl<'de> Deserialize<'de> for Signature {
                 use de::Error;
                 let mut arr = [0u8; SIGNATURE_LENGTH];
 
-                for i in 0..SIGNATURE_LENGTH {
-                    arr[i] = seq
+                for (i, byte) in arr.iter_mut().enumerate() {
+                    *byte = seq
                         .next_element()?
                         .ok_or_else(|| Error::invalid_length(i, &self))?;
                 }