diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 153082c..ac2ca39 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -70,5 +70,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@stable
       - uses: dtolnay/install@cargo-outdated
+      - name: Work around https://github.com/kbknapp/cargo-outdated/issues/402
+        run: sed -i '2i rust-version = "1.77"' Cargo.toml
       - run: cargo update
       - run: cargo outdated --workspace --exit-code 1