diff --git a/Dockerfile b/Dockerfile
index f0c3806..009e070 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM debian:latest
+FROM debian:stretch-slim
 RUN apt-get update && apt-get install -y python python-pip mosquitto git
 
 # Install paho-mqtt