diff --git a/.github/workflows/mypy_primer.yaml b/.github/workflows/mypy_primer.yaml
index 4dd8930f8c..dfa7ef12a2 100644
--- a/.github/workflows/mypy_primer.yaml
+++ b/.github/workflows/mypy_primer.yaml
@@ -11,6 +11,7 @@ on:
       - "crates/ruff_python_parser"
       - ".github/workflows/mypy_primer.yaml"
       - ".github/workflows/mypy_primer_comment.yaml"
+      - "Cargo.lock"
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref_name }}-${{ github.event.pull_request.number || github.sha }}