diff --git a/app.js b/app.js
index 6ca4cc6..ac4a382 100644
--- a/app.js
+++ b/app.js
@@ -102,7 +102,7 @@ router.get('/', async (ctx, next) => {
     const markdownContent = readMarkdown(contentPlain)
     if (markdownContent) {
       ctx.body = renderSandbox(markdownContent)
-      ctx.set('Content-Security-Policy', "default-src 'self'")
+      ctx.set('Content-Security-Policy', "default-src 'self' 'unsafe-inline'")
       ctx.set('Content-Type', 'text/html')
     } else {
       ctx.body = contentPlain