diff --git a/docker.Makefile b/docker.Makefile
index 29d0ff3d1672..ba8c6dedca67 100644
--- a/docker.Makefile
+++ b/docker.Makefile
@@ -107,7 +107,7 @@ yamldocs: build_docker_image ## generate documentation YAML files consumed by do
 
 .PHONY: shellcheck
 shellcheck: build_shell_validate_image ## run shellcheck validation
-	docker run -ti --rm $(ENVVARS) $(MOUNTS) $(VALIDATE_IMAGE_NAME) make shellcheck
+	docker run -ti --rm $(ENVVARS) $(MOUNTS) $(VALIDATE_IMAGE_NAME) scripts/validate/shellcheck
 
 .PHONY: test-e2e ## run e2e tests
 test-e2e: test-e2e-non-experimental test-e2e-experimental test-e2e-connhelper-ssh
diff --git a/dockerfiles/Dockerfile.shellcheck b/dockerfiles/Dockerfile.shellcheck
index 4d0ddd333247..483c42b744c4 100644
--- a/dockerfiles/Dockerfile.shellcheck
+++ b/dockerfiles/Dockerfile.shellcheck
@@ -1,10 +1,2 @@
-FROM    debian:stretch-slim
-
-RUN     apt-get update && \
-        apt-get -y install make shellcheck && \
-        apt-get clean
-
+FROM    koalaman/shellcheck-alpine:v0.4.7
 WORKDIR /go/src/github.com/docker/cli
-ENV     DISABLE_WARN_OUTSIDE_CONTAINER=1
-CMD     bash
-COPY    . .
diff --git a/scripts/validate/shellcheck b/scripts/validate/shellcheck
index 63cedf137b5a..f8354a5e7376 100755
--- a/scripts/validate/shellcheck
+++ b/scripts/validate/shellcheck
@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/bin/sh
 set -eo pipefail
 
 shellcheck contrib/completion/bash/docker