diff --git a/Dockerfile b/Dockerfile
index c74ef6b..416aa7d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.21 AS build
+FROM alpine:3.22 AS build
 LABEL maintainer="Luke Tainton <luke@tainton.uk>"
 
 FROM build AS webproc