diff --git a/Dockerfile b/Dockerfile
index bf85289..804719c 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -11,7 +11,6 @@ ARG GID=991
 
 
 ### Build Hardened Malloc
-ARG ALPINE_VERSION
 FROM docker.io/alpine:${ALPINE_VERSION} as build-malloc
 
 ARG HARDENED_MALLOC_VERSION