diff --git a/package.json b/package.json
index e1b3b1d..c7b3e04 100644
--- a/package.json
+++ b/package.json
@@ -5,6 +5,7 @@
   "type": "module",
   "scripts": {
     "build": "lessc styles/scrying-pool.less dist/styles/scrying-pool.css",
+    "postinstall": "npm run build",
     "watch": "chokidar 'styles/**/*.less' -c 'lessc styles/scrying-pool.less dist/styles/scrying-pool.css'",
     "typecheck": "tsc --noEmit",
     "lint": "eslint src/ module.js scripts/ tests/",