diff --git a/Makefile b/Makefile
index 67f2524..14bf0ee 100644
--- a/Makefile
+++ b/Makefile
@@ -8,6 +8,7 @@ prepare:
 	git submodule update --init --remote
 	$(MAKE) -C JOJ3
 	cp JOJ3/build/joj3 JOJ3/build/repo-health-checker bin/
+	upx -9 bin/*
 
 force-build: prepare
 	docker build --no-cache -t $(IMAGE_NAME) .