diff --git a/Dockerfile.legacy b/Dockerfile.legacy
index 940b778..a6be747 100644
--- a/Dockerfile.legacy
+++ b/Dockerfile.legacy
@@ -1,8 +1,5 @@
-# First stage - Download s6-overlay
-ARG DOWNLOADER_ALPINE_VERSION=3.15
-
 # First stage - Download s6-overlay and unpack it
-FROM --platform=${TARGETPLATFORM} alpine:${DOWNLOADER_ALPINE_VERSION} AS downloader
+FROM --platform=${TARGETPLATFORM} alpine:3.15 AS downloader
 
 ARG TARGETPLATFORM