diff --git a/Dockerfile b/Dockerfile
index 167d5642..73d949d2 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,6 +1,6 @@
 FROM docker.io/nginxproxy/docker-gen:0.14.4 AS docker-gen
 
-FROM docker.io/library/alpine:3.20.3
+FROM docker.io/library/alpine:3.21.0
 
 ARG GIT_DESCRIBE="unknown"
 ARG ACMESH_VERSION=3.1.0