diff --git a/Dockerfile b/Dockerfile
index a731914..d9bb7f3 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,8 +1,7 @@
 FROM alpine:3.12
-RUN apk update && apk add --no-cache bash git openssh python3 py3-pip graphviz
+RUN apk update && apk add --no-cache bash git openssh python3 py3-pip
 
-RUN python3 -m pip install --upgrade pip setuptools wheel
-RUN pip3 install --no-cache-dir graphviz pygraphviz django-extensions django
+RUN python3 -m pip install --upgrade pip setuptools wheel pyparsing pydot django-extensions django
 
 COPY entrypoint.sh /entrypoint.sh
 ENTRYPOINT ["/entrypoint.sh"]