diff --git a/public/base.html b/public/base.html
index f690652..21ac1f6 100644
--- a/public/base.html
+++ b/public/base.html
@@ -29,14 +29,14 @@
         <meta property="og:site_name" content="nercone's website">
         <meta property="og:title" content="{{ self.title() }}">
         <meta property="og:description" content="{{ self.description() }}">
-        <meta property="og:image" content="https://nercone.dev/assets/thumbnail/{{ request.url.path.lstrip('/') }}?title={{ self.title() | urlencode }}&description={{ self.description() | urlencode }}&template={% block thumbnail_template %}normal{% endblock %}">
+        <meta property="og:image" content="https://nercone.dev/assets/thumbnail/{{ request.url.path.strip('/') or 'index' }}?title={{ self.title() | urlencode }}&description={{ self.description() | urlencode }}&template={% block thumbnail_template %}normal{% endblock %}">
         <meta property="og:url" content="https://nercone.dev/">
         <meta property="og:type" content="website">
         <!-- Twitter -->
         <meta name="twitter:card" content="summary_large_image">
         <meta name="twitter:title" content="{{ self.title() }}">
         <meta name="twitter:description" content="{{ self.description() }}">
-        <meta name="twitter:image" content="https://nercone.dev/assets/thumbnail/{{ request.url.path.lstrip('/') }}?title={{ self.title() | urlencode }}&description={{ self.description() | urlencode }}&template={{ self.thumbnail_template() }}">
+        <meta name="twitter:image" content="https://nercone.dev/assets/thumbnail/{{ request.url.path.strip('/') or 'index' }}?title={{ self.title() | urlencode }}&description={{ self.description() | urlencode }}&template={{ self.thumbnail_template() }}">
         <!-- PWA (Progressive Web App) -->
         <link rel="manifest" href="/site.webmanifest">
         <link rel="apple-touch-icon" href="/assets/images/favicon.png" sizes="1200x1200">