diff --git a/tutorials/kube-mqtt/client/Dockerfile b/tutorials/kube-mqtt/client/Dockerfile
index a0bd66e5a9..6a68c782df 100644
--- a/tutorials/kube-mqtt/client/Dockerfile
+++ b/tutorials/kube-mqtt/client/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.9
+FROM alpine:3.14.6
 
 VOLUME /opt/certs