diff --git a/.github/workflows/md5.yml b/.github/workflows/md5.yml
index 991c6bf..3a6321e 100644
--- a/.github/workflows/md5.yml
+++ b/.github/workflows/md5.yml
@@ -8,49 +8,67 @@ on:
   push:
     branches: master
 
+defaults:
+  run:
+    working-directory: md5
+
 env:
   CARGO_INCREMENTAL: 0
   RUSTFLAGS: "-Dwarnings"
 
 jobs:
-  test:
+  # Linux tests
+  linux:
     strategy:
       matrix:
         include:
           # 32-bit Linux/x86
           - target: i686-unknown-linux-gnu
-            platform: ubuntu-latest
-            toolchain: 1.41.0 # MSRV
+            toolchain: 1.43.0 # MSRV
             deps: sudo apt install gcc-multilib
           - target: i686-unknown-linux-gnu
-            platform: ubuntu-latest
             toolchain: stable
             deps: sudo apt install gcc-multilib
 
           # 64-bit Linux/x86_64
           - target: x86_64-unknown-linux-gnu
-            platform: ubuntu-latest
-            toolchain: 1.41.0 # MSRV
+            toolchain: 1.43.0 # MSRV
             deps: true
           - target: x86_64-unknown-linux-gnu
-            platform: ubuntu-latest
             toolchain: stable
             deps: true
 
-    runs-on: ${{ matrix.platform }}
+    runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v1
-      - run: ${{ matrix.deps }}
       - uses: actions-rs/toolchain@v1
         with:
           profile: minimal
           toolchain: ${{ matrix.toolchain }}
           target: ${{ matrix.target }}
           override: true
-      # NOTE: using `marcopolo/cargo` fork to support the `working-directory` attribute
-      # See: https://github.com/actions-rs/cargo/pull/59
-      - uses: marcopolo/cargo@master
+      - run: ${{ matrix.deps }}
+      - run: cargo test --target ${{ matrix.target }} --release
+
+  # Windows tests
+  windows:
+    strategy:
+      matrix:
+        include:
+          # 64-bit Windows (GNU)
+          - target: x86_64-pc-windows-gnu
+            toolchain: 1.43.0 # MSRV
+          - target: x86_64-pc-windows-gnu
+            toolchain: stable
+
+    runs-on: windows-latest
+    steps:
+      - uses: actions/checkout@v1
+      - uses: actions-rs/toolchain@v1
         with:
-          command: test
-          working-directory: md5
-          args: --target ${{ matrix.target }} --release
+          profile: minimal
+          toolchain: ${{ matrix.toolchain }}
+          target: ${{ matrix.target }}
+          override: true
+      - uses: msys2/setup-msys2@v2
+      - run: cargo test --target ${{ matrix.target }} --release
diff --git a/.github/workflows/sha1.yml b/.github/workflows/sha1.yml
index 6639223..1b94798 100644
--- a/.github/workflows/sha1.yml
+++ b/.github/workflows/sha1.yml
@@ -8,66 +8,88 @@ on:
   push:
     branches: master
 
+defaults:
+  run:
+    working-directory: sha1
+
 env:
   CARGO_INCREMENTAL: 0
   RUSTFLAGS: "-Dwarnings"
 
 jobs:
-  test:
+  # Linux tests
+  linux:
     strategy:
       matrix:
         include:
           # 32-bit Linux/x86
           - target: i686-unknown-linux-gnu
-            platform: ubuntu-latest
-            rust: 1.41.0 # MSRV
-            use_cross: false
+            rust: 1.43.0 # MSRV
             deps: sudo apt install gcc-multilib
           - target: i686-unknown-linux-gnu
-            platform: ubuntu-latest
             rust: stable
-            use_cross: false
             deps: sudo apt install gcc-multilib
 
           # 64-bit Linux/x86_64
           - target: x86_64-unknown-linux-gnu
-            platform: ubuntu-latest
-            rust: 1.41.0 # MSRV
-            use_cross: false
-            deps: true
+            rust: 1.43.0 # MSRV
           - target: x86_64-unknown-linux-gnu
-            platform: ubuntu-latest
             rust: stable
-            use_cross: false
-            deps: true
 
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v1
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: ${{ matrix.rust }}
+          target: ${{ matrix.target }}
+          override: true
+      - run: ${{ matrix.deps }}
+      - run: cargo test --target ${{ matrix.target }} --release
+
+  # Windows tests
+  windows:
+    strategy:
+      matrix:
+        include:
+          # 64-bit Windows (GNU)
+          - target: x86_64-pc-windows-gnu
+            toolchain: 1.43.0 # MSRV
+          - target: x86_64-pc-windows-gnu
+            toolchain: stable
+
+    runs-on: windows-latest
+    steps:
+      - uses: actions/checkout@v1
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: ${{ matrix.toolchain }}
+          target: ${{ matrix.target }}
+          override: true
+      - uses: msys2/setup-msys2@v2
+      - run: cargo test --target ${{ matrix.target }} --release
+
+  # Cross-compiled tests
+  cross:
+    strategy:
+      matrix:
+        include:
           # ARM64
           - target: aarch64-unknown-linux-gnu
-            platform: ubuntu-latest
-            rust: 1.41.0 # MSRV
-            use_cross: true
-            deps: true
+            rust: 1.43.0 # MSRV
           - target: aarch64-unknown-linux-gnu
-            platform: ubuntu-latest
             rust: stable
-            use_cross: true
-            deps: true
 
-    runs-on: ${{ matrix.platform }}
+    runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v1
-      - run: ${{ matrix.deps }}
       - uses: actions-rs/toolchain@v1
         with:
           profile: minimal
           toolchain: ${{ matrix.rust }}
           target: ${{ matrix.target }}
           override: true
-      # NOTE: using `marcopolo/cargo` fork to support the `working-directory` attribute
-      # See: https://github.com/actions-rs/cargo/pull/59
-      - uses: marcopolo/cargo@master
-        with:
-          command: test
-          working-directory: sha1
-          use-cross: ${{ matrix.use_cross }}
-          args: --target ${{ matrix.target }} --release
+      - run: cargo install cross
+      - run: cross test --target ${{ matrix.target }} --release
diff --git a/.github/workflows/sha2.yml b/.github/workflows/sha2.yml
index c46d1e1..6fc8c58 100644
--- a/.github/workflows/sha2.yml
+++ b/.github/workflows/sha2.yml
@@ -17,61 +17,79 @@ env:
   RUSTFLAGS: "-Dwarnings"
 
 jobs:
-  test:
+  # Linux tests
+  linux:
     strategy:
       matrix:
         include:
           # 32-bit Linux/x86
           - target: i686-unknown-linux-gnu
-            platform: ubuntu-latest
-            rust: 1.41.0 # MSRV
-            use_cross: false
+            rust: 1.43.0 # MSRV
             deps: sudo apt install gcc-multilib
           - target: i686-unknown-linux-gnu
-            platform: ubuntu-latest
             rust: stable
-            use_cross: false
             deps: sudo apt install gcc-multilib
 
           # 64-bit Linux/x86_64
           - target: x86_64-unknown-linux-gnu
-            platform: ubuntu-latest
-            rust: 1.41.0 # MSRV
-            use_cross: false
-            deps: true
+            rust: 1.43.0 # MSRV
           - target: x86_64-unknown-linux-gnu
-            platform: ubuntu-latest
             rust: stable
-            use_cross: false
-            deps: true
 
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v1
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: ${{ matrix.rust }}
+          target: ${{ matrix.target }}
+          override: true
+      - run: ${{ matrix.deps }}
+      - run: cargo test --target ${{ matrix.target }} --release
+
+  # Windows tests
+  windows:
+    strategy:
+      matrix:
+        include:
+          # 64-bit Windows (GNU)
+          - target: x86_64-pc-windows-gnu
+            toolchain: 1.43.0 # MSRV
+          - target: x86_64-pc-windows-gnu
+            toolchain: stable
+
+    runs-on: windows-latest
+    steps:
+      - uses: actions/checkout@v1
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: ${{ matrix.toolchain }}
+          target: ${{ matrix.target }}
+          override: true
+      - uses: msys2/setup-msys2@v2
+      - run: cargo test --target ${{ matrix.target }} --release
+
+  # Cross-compiled tests
+  cross:
+    strategy:
+      matrix:
+        include:
           # ARM64
           - target: aarch64-unknown-linux-gnu
-            platform: ubuntu-latest
-            rust: 1.41.0 # MSRV
-            use_cross: true
-            deps: true
+            rust: 1.43.0 # MSRV
           - target: aarch64-unknown-linux-gnu
-            platform: ubuntu-latest
             rust: stable
-            use_cross: true
-            deps: true
 
-    runs-on: ${{ matrix.platform }}
+    runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v1
-      - run: ${{ matrix.deps }}
       - uses: actions-rs/toolchain@v1
         with:
           profile: minimal
           toolchain: ${{ matrix.rust }}
           target: ${{ matrix.target }}
           override: true
-      # NOTE: using `marcopolo/cargo` fork to support the `working-directory` attribute
-      # See: https://github.com/actions-rs/cargo/pull/59
-      - uses: marcopolo/cargo@master
-        with:
-          command: test
-          working-directory: sha1
-          use-cross: ${{ matrix.use_cross }}
-          args: --target ${{ matrix.target }} --release
+      - run: cargo install cross
+      - run: cross test --target ${{ matrix.target }} --release
diff --git a/.github/workflows/workspace.yml b/.github/workflows/workspace.yml
index 644a385..7851774 100644
--- a/.github/workflows/workspace.yml
+++ b/.github/workflows/workspace.yml
@@ -17,7 +17,7 @@ jobs:
       - uses: actions-rs/toolchain@v1
         with:
           profile: minimal
-          toolchain: 1.41.0 # MSRV
+          toolchain: 1.43.0 # MSRV
           components: clippy
           override: true
       - run: cargo clippy --all -- -D warnings
diff --git a/Cargo.lock b/Cargo.lock
index 6092935..c858659 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1,5 +1,6 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
+# 
 [[package]]
 name = "cc"
 version = "1.0.61"
diff --git a/README.md b/README.md
index e82da7b..12972a8 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-# RustCrypto: ASM hashes [![Project Chat][chat-image]][chat-link]
+# RustCrypto: ASM hashes ![Rust Version][rustc-image] [![Project Chat][chat-image]][chat-link]
 
 Assembly implementations of hash functions core functionality based on code from
 [Project Nayuki](https://www.nayuki.io/).
@@ -9,6 +9,23 @@ functionality please refer to the crates from
 enabled `asm` feature `md5`, `sha-1`, `sha2` and `whirlpool` crates will use
 code from this repository.
 
+## Supported Platforms
+
+All crates are tested on the following platforms:
+
+- Linux (32-bit and 64-bit x86)
+- Windows (64-bit x86, GNU only)
+- ARM64 (except `md5`, which is x86 only)
+
+Windows MSVC builds are known to be broken. See [#17].
+
+## Minimum Supported Rust Version
+
+All crates in this repository support **Rust 1.43** or higher.
+
+In the future when the minimum supported Rust version is changed,
+it will be accompanied by a minor version bump.
+
 ## License
 
 All crates licensed under the [MIT license](http://opensource.org/licenses/MIT).
@@ -21,5 +38,10 @@ dual licensed as above, without any additional terms or conditions.
 
 [//]: # (badges)
 
+[rustc-image]: https://img.shields.io/badge/rustc-1.43+-blue.svg
 [chat-image]: https://img.shields.io/badge/zulip-join_chat-blue.svg
 [chat-link]: https://rustcrypto.zulipchat.com/#narrow/stream/260041-hashes
+
+[//]: # (general links)
+
+[#17]: https://github.com/RustCrypto/asm-hashes/issues/17