diff --git a/package.json b/package.json
index 2d81adc..8278085 100644
--- a/package.json
+++ b/package.json
@@ -30,6 +30,7 @@
     "url-parse": "^1.5.10"
   },
   "devDependencies": {
+    "@nanostores/persistent": "^1.0.0",
     "@rollup/plugin-terser": "^0.4.4",
     "@rollup/plugin-typescript": "^8.3.0",
     "postcss": "^8.5.6",