diff --git a/website/fe/Makefile b/website/fe/Makefile
index ee9df45..94769da 100644
--- a/website/fe/Makefile
+++ b/website/fe/Makefile
@@ -32,8 +32,8 @@ REGION := $(call read_config_var,2)
 REG_NAME = $(call aws_region_to_short_name,$(REGION))
 WEBSITE_STACK = $(PROJECT_NAME)-$(ENV)-$(REG_NAME)
 
-deploy: S3_BUCKET := $(call aws_cf_output,$(WEBSITE_STACK),$(REGION),WebBucket)
-deploy: CLOUDFRONT_ID := $(call aws_cf_output,$(WEBSITE_STACK),$(REGION),Distribution)
+deploy: S3_BUCKET ?= $(call aws_cf_output,$(WEBSITE_STACK),$(REGION),WebBucket)
+deploy: CLOUDFRONT_ID ?= $(call aws_cf_output,$(WEBSITE_STACK),$(REGION),Distribution)
 deploy: \
 	assert-ENV \
 	assert-S3_BUCKET \