diff --git a/Makefile b/Makefile
index da77654..6a54ada 100644
--- a/Makefile
+++ b/Makefile
@@ -6,7 +6,7 @@ SHELL := /bin/bash
 
 BOUNCER_VERSION ?= 
 GIT_COMMIT := $(shell git rev-parse --short HEAD)
-DATE_VERSION := $(shell date +%Y.%-m.%-d)
+DATE_VERSION := $(shell git show -s --format=%cd --date=format:'%Y-%-m-%d' $(GIT_COMMIT))
 FULL_VERSION := v$(DATE_VERSION)-$(GIT_COMMIT)$(if $(shell git diff --stat),-dirty,)
 
 DOCKER_IMAGE_NAME ?= reg.cadoles.com/cadoles/bouncer