diff --git a/Dockerfile b/Dockerfile
index 81ab3e1..0c05934 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,4 +3,7 @@ FROM python:alpine
 ADD requirements.txt /
 ADD hugo-encryptor.py /
 
+RUN apk add --update libxslt libxml2 libxml2-dev && \
+    rm -rf /var/cache/apk/*
+
 RUN pip install --no-cache-dir -r /requirements.txt