diff --git a/Containers/domaincheck/Dockerfile b/Containers/domaincheck/Dockerfile
index 130a00012ac..c6ea2a4cc2c 100644
--- a/Containers/domaincheck/Dockerfile
+++ b/Containers/domaincheck/Dockerfile
@@ -1,5 +1,5 @@
 # syntax=docker/dockerfile:latest
-FROM alpine:3.20.3
+FROM alpine:3.21.0
 RUN set -ex; \
     apk upgrade --no-cache -a; \
     apk add --no-cache bash lighttpd netcat-openbsd; \