diff --git a/quarto-ghp/action.yml b/quarto-ghp/action.yml
index 2604942..3196702 100644
--- a/quarto-ghp/action.yml
+++ b/quarto-ghp/action.yml
@@ -30,7 +30,7 @@ runs:
       run: |
         set -ux
         python -m pip install --upgrade pip
-        pip install --user pipenv
+        pip install --user pipenv==2022.8.5  # because of `lock -r` change in https://github.com/pypa/pipenv/pull/5200
         if [ $USE_PRE ]; then
           pip install -Uq git+https://github.com/fastai/ghapi.git
           pip install -Uq git+https://github.com/fastai/fastcore.git