diff --git a/Dockerfile b/Dockerfile
index f9a6bb0..2ae17bf 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,8 +1,8 @@
 FROM alpine:3.12
 LABEL maintainer sndsgd
 
-ARG NODE_VERSION=12.17.0-r0
-ARG LESS_VERSION=3.11.3
+ARG NODE_VERSION
+ARG LESS_VERSION
 
 RUN apk add --update --no-cache nodejs=${NODE_VERSION} nodejs-npm \
     && npm install -g less@${LESS_VERSION}
diff --git a/Makefile b/Makefile
index 2d34e67..2feace2 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
 CWD := $(shell pwd)
 
-NODE_VERSION ?= 12.17.0-r0
-LESS_VERSION ?= 3.11.3
+NODE_VERSION ?= 12.18.3-r0
+LESS_VERSION ?= 3.12.2
 
 IMAGE_NAME ?= sndsgd/less
 IMAGE := $(IMAGE_NAME):$(LESS_VERSION)
@@ -23,3 +23,7 @@ build: build-image
 .PHONY: help
 help: build-image
 	docker run --rm $(IMAGE) --help
+
+.PHONY: version
+version: build-image
+	docker run --rm $(IMAGE) --version