diff --git a/libnetwork/cmd/ssd/Dockerfile b/libnetwork/cmd/ssd/Dockerfile
old mode 100755
new mode 100644
index 05422479207a2..f67f253c9589f
--- a/libnetwork/cmd/ssd/Dockerfile
+++ b/libnetwork/cmd/ssd/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.7
+FROM alpine:3.21.0
 ENV PACKAGES="\
     musl \
     linux-headers \