diff --git a/Dockerfile b/Dockerfile
index 6c676c4..e38dce0 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,7 +2,7 @@ FROM alpine:3.12
 RUN apk update && apk add --no-cache bash git openssh python3 py3-pip python-pydot python-pydot-ng graphviz
 
 RUN python3 -m pip install --upgrade pip setuptools wheel
-RUN pip3 install --no-cache-dir pygraphviz django-extensions django
+RUN pip3 install --no-cache-dir pyparsing pydot pygraphviz django-extensions django
 
 COPY entrypoint.sh /entrypoint.sh
 ENTRYPOINT ["/entrypoint.sh"]