diff --git a/Dockerfile b/Dockerfile
index ab94b44..17839de 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.20.3 AS builder
+FROM alpine:3.21.0 AS builder
 
 # image owner label
 LABEL org.opencontainers.image.source https://github.com/ironpeakservices/iron-scratch