diff --git a/package.json b/package.json
index 35a3dde..d636a34 100644
--- a/package.json
+++ b/package.json
@@ -5,7 +5,7 @@
   "main": "index.js",
   "scripts": {
     "build": "marp index.md --allow-local-files -o build/index.html && cp -r assets build/",
-    "dev": "marp --server --allow-local-files -p 3030 ./",
+    "dev": "marp --server --allow-local-files -p 1313 ./",
     "watch": "marp --watch --allow-local-files index.md",
     "export:pdf": "marp index.md --allow-local-files --pdf -o build/index.pdf",
     "export:html": "marp index.md --allow-local-files --html -o build/index.html && cp -r assets build/",