diff --git a/Dockerfile b/Dockerfile
index 798d340..1edb05f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -17,7 +17,7 @@ RUN pip install wheel cppy
 # Install dependencies into the virtual environment with Pipenv
 RUN pipenv install --deploy --verbose
 FROM python:3.8-slim
-RUN apt-get install --no-install-recommends -y \
+RUN apt-get update && apt-get install --no-install-recommends -y \
     cloud-utils \
     libvirt-clients \
     openssh-client \