diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index d80b9fb..30d9018 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -28,11 +28,9 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-
       - uses: dtolnay/rust-toolchain@stable
         with:
           components: rustfmt
-
       - run: cargo fmt --all --check
 
   test:
@@ -44,22 +42,17 @@ jobs:
           - stable
           - beta
           - nightly
-
         os:
           - ubuntu-latest
           - windows-latest
-          - macOS-latest
-
+          - macos-latest
     runs-on: ${{ matrix.os }}
-
     steps:
       - uses: actions/checkout@v4
-
       - name: Install Rust (${{ matrix.rust }})
         uses: dtolnay/rust-toolchain@master
         with:
           toolchain: ${{ matrix.rust }}
-
       - run: cargo test --all-features
 
   msrv:
@@ -67,36 +60,25 @@ jobs:
     needs: [style]
     strategy:
       matrix:
-        rust:
-          - 1.63 # keep in sync with MSRV.md dev doc
-
-        os:
-          - ubuntu-latest
-
-    runs-on: ${{ matrix.os }}
-
+        rust: [ 1.63 ] # keep in sync with 'rust-version' in Cargo.toml
+    runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-
       - name: Install Rust (${{ matrix.rust }})
         uses: dtolnay/rust-toolchain@master
         with:
           toolchain: ${{ matrix.rust }}
-
       - run: cargo check --features full
 
   miri:
     name: Test with Miri
     needs: [style]
     runs-on: ubuntu-latest
-
     steps:
       - uses: actions/checkout@v4
-
       - uses: dtolnay/rust-toolchain@nightly
         with:
           components: miri
-
       - name: Test
         env:
           # Can't enable tcp feature since Miri does not support the tokio runtime
@@ -109,11 +91,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-
       - uses: dtolnay/rust-toolchain@stable
-
       - uses: taiki-e/install-action@cargo-hack
-
       - run: cargo hack --no-dev-deps check --feature-powerset --depth 2
 
   semver:
@@ -134,7 +113,5 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-
       - uses: dtolnay/rust-toolchain@nightly
-
       - run: cargo rustdoc -- --cfg docsrs -D rustdoc::broken-intra-doc-links
diff --git a/Cargo.toml b/Cargo.toml
index c5a3c77..9e7758d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -11,6 +11,7 @@ authors = ["Sean McArthur <sean@seanmonstar.com>"]
 keywords = ["http", "hyper", "hyperium"]
 categories = ["network-programming", "web-programming::http-client", "web-programming::http-server"]
 edition = "2021"
+rust-version = "1.63"
 
 [package.metadata.docs.rs]
 features = ["full"]