diff --git a/Makefile b/Makefile
index e94db70..a00b636 100644
--- a/Makefile
+++ b/Makefile
@@ -1,3 +1,5 @@
+DOCKER_TAG ?= local
+
 .PHONY: build
 build:
-	@docker build -t offen/docker-volume-backup:latest .
+	@docker build -t offen/docker-volume-backup:$(DOCKER_TAG) .