diff --git a/code-formatter/Makefile b/code-formatter/Makefile
index 85f8a6a..df7fad7 100644
--- a/code-formatter/Makefile
+++ b/code-formatter/Makefile
@@ -24,6 +24,7 @@ all : build release
 
 build :
 	docker build --build-arg VERSION=$(VERSION) --build-arg COMMIT_SHA=$(COMMIT) -t $(DOCKER_REGISTRY)/$(APP_NAME):$(VERSION)-php7.3 .
+	docker build --build-arg VERSION=$(VERSION) --build-arg COMMIT_SHA=$(COMMIT) -t $(DOCKER_REGISTRY)/$(APP_NAME):$(VERSION)-php5.6 .
 	docker tag $(DOCKER_REGISTRY)/$(APP_NAME):$(VERSION)-php7.3 $(DOCKER_REGISTRY)/$(APP_NAME):$(VERSION)
 	docker tag $(DOCKER_REGISTRY)/$(APP_NAME):$(VERSION)-php7.3 $(DOCKER_REGISTRY)/$(APP_NAME):latest