diff --git a/microservices-demo/healthcheck/Dockerfile b/microservices-demo/healthcheck/Dockerfile
index 58c0062..986d457 100644
--- a/microservices-demo/healthcheck/Dockerfile
+++ b/microservices-demo/healthcheck/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.12.0
+FROM alpine:3.21.3
 
 RUN apk update && \
     apk add ruby ruby-json ruby-rdoc ruby-irb