diff --git a/.github/workflows/rust-tests.yml b/.github/workflows/rust-tests.yml
index 46de905..bd6b456 100644
--- a/.github/workflows/rust-tests.yml
+++ b/.github/workflows/rust-tests.yml
@@ -31,6 +31,9 @@ jobs:
       - name: Check formatting
         run: cargo fmt -- --check
 
+      - name: Check Cargo.lock up to date
+        run: cargo update -w --frozen
+
       - uses: actions-rs/clippy-check@v1
         with:
           token: ${{ secrets.GITHUB_TOKEN }}