diff --git a/.github/workflows/readme.yml b/.github/workflows/readme.yml
index 5f8ba53..03a14ac 100644
--- a/.github/workflows/readme.yml
+++ b/.github/workflows/readme.yml
@@ -23,5 +23,6 @@ jobs:
           python -m pip install --upgrade pip
           python -m pip install invoke rundoc .
           python -m pip install tomli
+          python -m pip install packaging
     - name: Run the README.md
       run: invoke readme