diff --git a/Makefile b/Makefile
index 161165a..dcb5f8d 100644
--- a/Makefile
+++ b/Makefile
@@ -16,6 +16,7 @@ js: $(JS_OUTPUTS)
 
 public/js/%.min.js: frontend/src/%.js
 	cd frontend; rollup -c rollup.config.js
+	mkdir -p public/js
 	cp $(patsubst frontend/src/%.js, frontend/dist/%.min.js, $<) $@
 
 #