PyO3 · davidhewitt · Jan 15, 2026 · Jan 10, 2026 · Jan 11, 2026 · Jan 15, 2026
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
@@ -29,6 +29,20 @@ jobs:
       - name: Check rust formatting (rustfmt)
         run: cargo fmt --all -- --check
 
+  resolve:
+    runs-on: ubuntu-latest
+    outputs:
+      MSRV: ${{ steps.resolve-msrv.outputs.MSRV }}
+      verbose: ${{ runner.debug == '1' }}
+    steps:
+      - uses: actions/[email protected]
+      - uses: actions/setup-python@v6
+        with:
+          python-version: "3.x"
+      - name: resolve MSRV
+        id: resolve-msrv
+        run: echo MSRV=`python -c 'import tomllib; print(tomllib.load(open("Cargo.toml", "rb"))["workspace"]["package"]["rust-version"])'` >> $GITHUB_OUTPUT
+
   clippy:
     runs-on: ubuntu-latest
     steps:
@@ -40,76 +54,33 @@ jobs:
       - run: make clippy
 
   build:
-    needs: [fmt] # don't wait for clippy as fails rarely and takes longer
+    needs: [fmt, resolve] # don't wait for clippy as fails rarely and takes longer
     name: python${{ matrix.python-version }}-${{ matrix.platform.python-architecture }} ${{ matrix.platform.os }} ${{ matrix.msrv }}
     runs-on: ${{ matrix.platform.os }}
     strategy:
       fail-fast: false # If one platform fails, allow the rest to keep testing.
       matrix:
         rust: [stable]
-        python-version:
-          [
-            "3.9",
-            "3.10",
-            "3.11",
-            "3.12",
-            "3.13",
-            "3.13t",
-            "3.14-dev",
-            "3.14t-dev",
-            "pypy-3.11",
-          ]
-        platform:
-          [
-            {
-              os: "macos-latest",
-              python-architecture: "arm64",
-              rust-target: "aarch64-apple-darwin",
-            },
-            {
-              os: "ubuntu-latest",
-              python-architecture: "x64",
-              rust-target: "x86_64-unknown-linux-gnu",
-            },
-            {
-              os: "windows-latest",
-              python-architecture: "x64",
-              rust-target: "x86_64-pc-windows-msvc",
-            },
-          ]
+        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13", "3.13t", "3.14-dev", "3.14t-dev", "pypy-3.11"]
+        platform: [{os: "macos-latest", python-architecture: "arm64", rust-target: "aarch64-apple-darwin"}, {os: "ubuntu-latest", python-architecture: "x64", rust-target: "x86_64-unknown-linux-gnu"}, {os: "windows-latest", python-architecture: "x64", rust-target: "x86_64-pc-windows-msvc"}]
         include:
           # Test minimal supported Rust version
-          - rust: 1.74.0
+          - rust: ${{ needs.resolve.outputs.MSRV }}
             python-version: "3.13"
-            platform:
-              {
-                os: "ubuntu-latest",
-                python-architecture: "x64",
-                rust-target: "x86_64-unknown-linux-gnu",
-              }
+            platform: {os: "ubuntu-latest", python-architecture: "x64", rust-target: "x86_64-unknown-linux-gnu"}
             msrv: "MSRV"
 
           # Test the `nightly` feature
           - rust: nightly
             python-version: "3.13"
-            platform:
-              {
-                os: "ubuntu-latest",
-                python-architecture: "x64",
-                rust-target: "x86_64-unknown-linux-gnu",
-              }
+            platform: {os: "ubuntu-latest", python-architecture: "x64", rust-target: "x86_64-unknown-linux-gnu"}
             msrv: "nightly"
             extra_features: "nightly"
 
           # Test 32-bit windows just on latest Python
           - rust: stable
             python-version: "3.13"
-            platform:
-              {
-                os: "windows-latest",
-                python-architecture: "x86",
-                rust-target: "i686-pc-windows-msvc",
-              }
+            platform: {os: "windows-latest", python-architecture: "x86", rust-target: "i686-pc-windows-msvc"}
 
     steps:
       - uses: actions/checkout@v4
@@ -126,6 +97,12 @@ jobs:
           toolchain: ${{ matrix.rust }}
           target: ${{ matrix.platform.rust-target }}
 
+      - if: ${{ matrix.msrv == 'MSRV' }}
+        name: Lock package versions for MSRV
+        run: cargo +stable update
+        env:
+          CARGO_RESOLVER_INCOMPATIBLE_RUST_VERSIONS: fallback
+
       - name: Build (no features)
         run: cargo build --no-default-features --verbose --target ${{ matrix.platform.rust-target }}
 
@@ -142,14 +119,10 @@ jobs:
         run: |
           python -m pip install -U uvloop
 
-      - if: ${{ matrix.msrv != 'MSRV' && !startsWith(matrix.python-version, 'pypy') }}
+      - if: ${{ !startsWith(matrix.python-version, 'pypy') }}
         name: Test
         run: cargo test --all-features --target ${{ matrix.platform.rust-target }}
 
-      - if: ${{ matrix.msrv == 'MSRV' && !startsWith(matrix.python-version, 'pypy') }}
-        name: Test (MSRV, --no-default-features)
-        run: cargo test --no-default-features --features tokio-runtime,async-std-runtime,attributes,unstable-streams --target ${{ matrix.platform.rust-target }}
-
     env:
       RUST_BACKTRACE: 1
       RUSTFLAGS: "-D warnings"

diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -10,6 +10,10 @@ To see unreleased changes, please see the CHANGELOG on the main branch.
 
 <!-- towncrier release notes start -->
 
+## [Unreleased]
+
+- Bump MSRV to 1.83.
+
 ## [0.27.0] - 2025-10-20
 
 - Avoid attaching to the runtime when cloning TaskLocals by using std::sync::Arc. [#62](https://github.com/PyO3/pyo3-async-runtimes/pull/62)
@@ -47,5 +51,10 @@ To see unreleased changes, please see the CHANGELOG on the main branch.
 
 Previous versions were published from [`pyo3-asyncio`](https://github.com/awestlake87/pyo3-asyncio). Consult that library for older changes.
 
-[Unreleased]: https://github.com/PyO3/pyo3-async-runtimes/compare/v0.22.0...HEAD
+[Unreleased]: https://github.com/PyO3/pyo3-async-runtimes/compare/v0.27.0...HEAD
+[0.27.0]: https://github.com/PyO3/pyo3-async-runtimes/compare/v0.26.0...v0.27.0
+[0.26.0]: https://github.com/PyO3/pyo3-async-runtimes/compare/v0.25.0...v0.26.0
+[0.25.0]: https://github.com/PyO3/pyo3-async-runtimes/compare/v0.24.0...v0.25.0
+[0.24.0]: https://github.com/PyO3/pyo3-async-runtimes/compare/v0.23.0...v0.24.0
+[0.23.0]: https://github.com/PyO3/pyo3-async-runtimes/compare/v0.22.0...v0.23.0
 [0.22.0]: https://github.com/PyO3/pyo3-async-runtimes/tree/0.22.0
diff --git a/Cargo.toml b/Cargo.toml
@@ -14,11 +14,13 @@ documentation = "https://docs.rs/crate/pyo3-async-runtimes/"
 categories = ["api-bindings", "development-tools::ffi"]
 license = "Apache-2.0"
 exclude = ["/.gitignore", "/codecov.yml", "/Makefile"]
-edition = "2021"
-rust-version = "1.74"
+edition = { workspace = true }
+rust-version = { workspace = true }
 
 [workspace]
 members = ["pyo3-async-runtimes-macros"]
+package.edition = "2021"
+package.rust-version = "1.83"
 
 [features]
 async-std-runtime = ["async-std"]

diff --git a/pyo3-async-runtimes-macros/Cargo.toml b/pyo3-async-runtimes-macros/Cargo.toml
@@ -13,7 +13,8 @@ repository = "https://github.com/PyO3/pyo3-async-runtimes"
 documentation = "https://docs.rs/crate/pyo3-async-runtimes/"
 categories = ["api-bindings", "development-tools::ffi"]
 license = "Apache-2.0"
-edition = "2018"
+edition = { workspace = true }
+rust-version = { workspace = true }
 
 [lib]
 proc-macro = true