diff --git a/.gitea/workflows/ci.yaml b/.gitea/workflows/ci.yaml
index cf483705..b3769f91 100644
--- a/.gitea/workflows/ci.yaml
+++ b/.gitea/workflows/ci.yaml
@@ -335,6 +335,8 @@ 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: Install PostgreSQL, pgvector and Redis
         run: |
           set -euo pipefail