diff --git a/image/Dockerfile b/image/Dockerfile
index 79503375..2b7c7fbc 100644
--- a/image/Dockerfile
+++ b/image/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.21
+FROM alpine:3.24@sha256:294b683cb724975bec92580e1e685676bd4b50bda910ddb8c51d4cabeaec77e6
 
 RUN apk add --no-cache shadow shadow-subids iproute2