diff --git a/Makefile b/Makefile
index b627e94..2e99008 100644
--- a/Makefile
+++ b/Makefile
@@ -9,7 +9,7 @@ prepare:
 	$(MAKE) -C JOJ3
 	cp JOJ3/build/joj3 JOJ3/build/repo-health-checker bin/
 	ls -lha bin
-	upx -9 bin/*
+	upx --best bin/repo-health-checker
 	ls -lha bin
 
 force-build: prepare