diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 9e5537e3..adec757c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -49,7 +49,7 @@ jobs:
       # deliberate change with the reformat in the same commit.
       - uses: dtolnay/rust-toolchain@stable
         with:
-          toolchain: nightly-2026-10-19
+          toolchain: nightly-2026-10-20
           components: rustfmt
       - name: Check formatting
         run: cargo fmt --check