diff --git a/seafile-server/Dockerfile b/seafile-server/Dockerfile
index d8524f8..114d7aa 100644
--- a/seafile-server/Dockerfile
+++ b/seafile-server/Dockerfile
@@ -29,6 +29,7 @@ python3-pymysql \
 python3-jinja2 \
 python3-sqlalchemy \
 python3-pycryptodome \
+python3-lxml \
 && rm -rf /var/lib/apt/lists/*
 
 RUN cp -r  /usr/lib/python3/dist-packages/Cryptodome /usr/lib/python3/dist-packages/Crypto