diff --git a/package/docker/Dockerfile b/package/docker/Dockerfile
index 9eb3e88..b2ed6a7 100644
--- a/package/docker/Dockerfile
+++ b/package/docker/Dockerfile
@@ -2,13 +2,15 @@
 FROM python:3.9-alpine
 
 ADD . /
-RUN mkdir -p /var/lib/easywks \
+RUN apk --update add build-base libffi libffi-dev \
+  && mkdir -p /var/lib/easywks \
   && chown 1000:0 -R /var/lib/easywks \
   && chmod 0700 /var/lib/easywks \
   && pip3 install -e . \
   && mv /package/docker/entrypoint.sh /entrypoint.sh \
   && mv /package/docker/easywks.yml /etc/easywks.yml \
-  && rm -rf /package
+  && rm -rf /package \
+  && apk del build-base libffi-dev
 
 USER 1000