diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index ae381bb..164bf17 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -37,6 +37,6 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - run: rustup update stable && rustup default stable
+      - run: rustup update ${{ matrix.toolchain }} && rustup default ${{ matrix.toolchain }}
       - run: rustup component add rustfmt
       - run: cargo fmt --all -- --check