diff --git a/Makefile b/Makefile
index 27183969..efed87ae 100644
--- a/Makefile
+++ b/Makefile
@@ -181,6 +181,7 @@ webpack:
 .PHONY: $(TARGETS)
 
 sass:
+	npm rebuild node-sass
 	node-sass lib/gui/app/scss/main.scss > lib/gui/css/main.css
 
 lint-js: