diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 1c08314b..dc3f812e 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -36,7 +36,7 @@ jobs:
     uses: ComPWA/actions/.github/workflows/pytest.yml@v1
     with:
       coverage-target: ampform_dpd
-      macos-python-version: "3.7"
+      macos-python-version: "3.9"
       specific-pip-packages: ${{ inputs.specific-pip-packages }}
   style:
     if: inputs.specific-pip-packages == ''
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index fc141812..21578067 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -83,6 +83,7 @@ repos:
         args:
           - --extra-keys
           - |
+            cell.attachments
             cell.metadata.code_folding
             cell.metadata.id
             cell.metadata.user_expressions