diff --git a/package.json b/package.json
index 9c7a2df..559a846 100644
--- a/package.json
+++ b/package.json
@@ -21,6 +21,7 @@
   "type": "module",
   "devDependencies": {
     "esbuild": "^0.27.4",
+    "jscpd": "^4.0.8",
     "less": "^4.2.0"
   },
   "dependencies": {