diff --git a/Dockerfile b/Dockerfile
index 7a58fa9..d823c7e 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.10
+FROM alpine:3.12
 RUN apk -U upgrade && apk add mosquitto mosquitto-clients openssl
 EXPOSE 8883
 ENTRYPOINT ["mosquitto", "-c", "/etc/mosquitto/mosquitto.conf"]