diff --git a/packages/core/CHANGELOG.md b/packages/core/CHANGELOG.md
index d879102..37ab33d 100644
--- a/packages/core/CHANGELOG.md
+++ b/packages/core/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Changelog
 
+## 0.1.1 (2022-09-03)
+
+- Fix VitePress compatibility
+
 ## 0.1.0 (2022-09-02)
 
 Initial release
diff --git a/packages/core/package.json b/packages/core/package.json
index b4cf8f5..1ed3762 100644
--- a/packages/core/package.json
+++ b/packages/core/package.json
@@ -1,7 +1,7 @@
 {
   "name": "@whyframe/core",
   "description": "Core library for whyframe",
-  "version": "0.1.0",
+  "version": "0.1.1",
   "author": "Bjorn Lu",
   "license": "MIT",
   "type": "module",
diff --git a/packages/core/src/plugins/core.js b/packages/core/src/plugins/core.js
index 9cd38cd..17bb40d 100644
--- a/packages/core/src/plugins/core.js
+++ b/packages/core/src/plugins/core.js
@@ -68,7 +68,7 @@ export async function createApp(el) {
   const result = await data.createApp(el)
   return result
 }
-if (typeof window !== 'undefined') {
+if (typeof window !== 'undefined' && window.frameElement) {
   new MutationObserver((mutations) => {
     for (const m of mutations) {
       if (m.type === 'attributes' && m.attributeName === 'data-why-id') {