diff --git a/package.json b/package.json
index bf2b976..03f44e8 100644
--- a/package.json
+++ b/package.json
@@ -25,6 +25,7 @@
     "grunt-shell": "^4.0.0",
     "grunt-terser": "^2.0.0",
     "imagemin": "^9.0.1",
+    "jsdom": "^29.1.1",
     "optipng-bin": "^9.0.0",
     "sass": "^1.99.0",
     "vinyl-fs": "^4.0.2",