diff --git a/Makefile b/Makefile
index 89999c6..968631a 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,7 @@
-proxy-image:
+build: shard.yml src/*
+	shards build
+proxy-image: build
 	docker build . -t faaso-proxy --no-cache
 start-proxy:
 	docker run --network=faaso-net -v /var/run/docker.sock:/var/run/docker.sock -p 8888:8888 -p 3000:3000 faas
-o-proxy
\ No newline at end of file
+o-proxy