diff --git a/Gruntfile.js b/Gruntfile.js
index 911ebc335fa57564eeec397ebdf57caa8900c370..de6f3c9b745806cac2cafaf7b514d12d58e1862d 100644
--- a/Gruntfile.js
+++ b/Gruntfile.js
@@ -72,7 +72,7 @@ module.exports = grunt => {
             "--variable=theme:irstea",
             "--variable=history:true",
             env === "dev" &&
-              `--variable=header-includes='<script src="//${PUBLIC_HOST}:${LIVERELOAD_PORT}/livereload.js"></script>'`
+              `--variable=header-includes:"<script src='//${PUBLIC_HOST}:${LIVERELOAD_PORT}/livereload.js'></script>"`
           ]
             .filter(v => !!v)
             .join(" "),