diff --git a/Dockerfile b/Dockerfile
index a941428..b45579c 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,7 @@
 #-------------------
 # Download hcloud
 #-------------------
-FROM alpine:3.20.3@sha256:1e42bbe2508154c9126d48c2b8a75420c3544343bf86fd041fb7527e017a4b4a as builder
+FROM alpine:3.21.0@sha256:e323a465c03a31ad04374fc7239144d0fd4e2b92da6e3e0655580476d3a84621 as builder
 
 # renovate: datasource=github-releases depName=hcloud-cli lookupName=hetznercloud/cli
 ARG HCLOUD_VERSION=v1.49.0