diff --git a/Dockerfile b/Dockerfile
index e5ac115..b12add9 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.9
+FROM alpine:3.10
 RUN apk -U add mosquitto mosquitto-clients openssl
 EXPOSE 8883
 ENTRYPOINT ["mosquitto", "-c", "/etc/mosquitto/mosquitto.conf"]