diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 9c51b52..2a84d20 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -41,6 +41,11 @@ jobs:
       - run: cargo test
       - run: cargo check --no-default-features
       - run: cargo check --features backtrace
+      - uses: actions/upload-artifact@v4
+        if: matrix.rust == 'nightly' && always()
+        with:
+          name: Cargo.lock
+          path: Cargo.lock
 
   build:
     name: Rust ${{matrix.rust}}