diff --git a/.gitea/workflows/ci.yml b/.gitea/workflows/ci.yml
index b67a8fe..7eb7aca 100644
--- a/.gitea/workflows/ci.yml
+++ b/.gitea/workflows/ci.yml
@@ -33,5 +33,7 @@ jobs:
           tar -C /usr/local -xzf "$RUNNER_TEMP/go.tgz"
           ln -sfn /usr/local/go/bin/go /usr/local/bin/go
           ln -sfn /usr/local/go/bin/gofmt /usr/local/bin/gofmt
+      - name: Install house-style Python packages
+        run: python3 -m pip install --break-system-packages -i https://pypi.tuna.tsinghua.edu.cn/simple python-docx python-pptx openpyxl
       - name: Vet and test
         run: GOWORK=off go vet ./... && GOWORK=off go test -count=1 ./...