diff --git a/Dockerfile b/Dockerfile
index 2e310fe3..8b9d9236 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 FROM python:3.6-buster AS builder
-RUN apt-get update && apt-get install -y gcc python-pip
+RUN apt-get update && apt-get install -y gcc python-pip lxml
 ADD app/requirements.txt /requirements.txt
 RUN pip install -U pip && pip install -r requirements.txt