diff --git a/Dockerfile b/Dockerfile
index 0fe111c..861754e 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -8,7 +8,7 @@ ARG S6_ARCH_amd64
 ARG S6_OVERLAY_VERSION=${S6_OVERLAY_VERSION}
 ARG ROOTFS=/root-out
 ARG REL=${APP_VERSION}
-ARG ARCH=amd64
+ARG ARCH=x86_64
 ARG MIRROR=http://dl-cdn.alpinelinux.org/alpine
 ARG PACKAGES=alpine-baselayout,\
 alpine-keys,\