diff --git a/Dockerfile b/Dockerfile
index dcd4dceb..5b254670 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -38,7 +38,7 @@ RUN apk add --no-cache \
     && mkdir /store && chown node:node /store
 
 # Build stage for healthcheck binary (~65KB static binary)
-FROM alpine:3.21@sha256:c3f8e73fdb79deaebaa2037150150191b9dcbfba68b4a46d70103204c53f4709 AS healthcheck-build
+FROM alpine:3.21@sha256:48b0309ca019d89d40f670aa1bc06e426dc0931948452e8491e3d65087abc07d AS healthcheck-build
 RUN apk add --no-cache gcc=14.2.0-r4 musl-dev=1.2.5-r11
 COPY healthcheck.c /src/healthcheck.c
 RUN gcc -Os -static -s -o /bin/healthcheck /src/healthcheck.c