diff --git a/Dockerfile b/Dockerfile
index 8ed882d..a571e3c 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -5,7 +5,7 @@ ARG S6_OVERLAY_PAK_EXT=".tar.xz"
 
 
 # Downloader stage: download s6-overlay base, binary, symlinks and checksums
-FROM busybox AS downloader
+FROM alpine:3.21 AS downloader
 ARG TARGETPLATFORM
 ARG S6_OVERLAY_VERSION
 ARG S6_OVERLAY_RELEASE
diff --git a/Dockerfile.legacy b/Dockerfile.legacy
index e240af3..b557cb6 100644
--- a/Dockerfile.legacy
+++ b/Dockerfile.legacy
@@ -1,5 +1,5 @@
 # First stage - Download s6-overlay and unpack it
-FROM busybox AS downloader
+FROM alpine:3.21 AS downloader
 
 ARG TARGETPLATFORM