diff --git a/Dockerfile b/Dockerfile
index 6b7cce9..b5d02f6 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -4,14 +4,14 @@ FROM python:${PYTHON}-stretch
 
 RUN apt-get update && apt-get install -y pandoc
 
-RUN pip install poetry==1.0.0 && poetry config virtualenvs.create false && pip install -U pip
+RUN pip install --no-cache-dir poetry==1.0.0 && poetry config virtualenvs.create false && pip install --no-cache-dir -U pip
 
 ADD poetry.lock /tmp
 ADD pyproject.toml /tmp
 RUN cd /tmp && poetry install
 
 ADD docs/requirements.txt /tmp/requirements-docs.txt
-RUN pip install -r /tmp/requirements-docs.txt
+RUN pip install --no-cache-dir -r /tmp/requirements-docs.txt
 
 ADD . /yangify