diff --git a/Dockerfile b/Dockerfile
index bfd0507..011edbf 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.12
+FROM alpine:3.14
 RUN \
   apk -U upgrade && apk add mosquitto mosquitto-clients openssl && \
   echo "log_dest stdout" >/etc/mosquitto/mosquitto.conf