diff --git a/Dockerfile b/Dockerfile
index a5b77d3..1c308b1 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,6 +1,14 @@
 FROM alpine:3.24.2@sha256:294b683cb724975bec92580e1e685676bd4b50bda910ddb8c51d4cabeaec77e6 AS base
 
-RUN apk update && apk add --no-cache --upgrade 'rsync>=3.5.1-r0' openssh openssl busybox
+# Add Alpine edge branch as tagged repository for rsync.
+RUN printf '%s\n' \
+    '@edge https://dl-cdn.alpinelinux.org/alpine/edge/main' \
+    '@edge https://dl-cdn.alpinelinux.org/alpine/edge/community' \
+    >> /etc/apk/repositories
+
+# Install rsync from Alpine edge branch for latest upstream security patches.
+# Other packages are installed from Alpine 3.24.2 branch.
+RUN apk update && apk add --no-cache --upgrade 'rsync@edge>=3.5.1-r0' openssh openssl busybox
 
 RUN rm -rf /var/cache/apk/*