diff --git a/context/Dockerfile b/context/Dockerfile
index ece152050fd7021a7dbf7b0e757d241c22bda4ef..fe87c924803e696914fd07231d6a3ddb68241b70 100644
--- a/context/Dockerfile
+++ b/context/Dockerfile
@@ -1,9 +1,9 @@
-FROM debian:stretch-slim
+FROM debian:bullseye-slim
 
 LABEL maintainer="ethitter"
 LABEL version="1.0"
 
-RUN echo "deb http://security.debian.org/ stretch/updates main" >> /etc/apt/sources.list
+RUN echo "deb http://security.debian.org/debian-security bullseye-security main contrib non-free" >> /etc/apt/sources.list
 
 RUN apt-get update \
     && apt-get -y --no-install-recommends install \