diff --git a/components/Sources.vue b/components/Sources.vue
index 44aa394..498841d 100644
--- a/components/Sources.vue
+++ b/components/Sources.vue
@@ -19,7 +19,9 @@ const props = defineProps({
 </script>
 <template>
     <ul>
-        <li v-for="s in bib">
+        <li v-for="(s, index) in bib">
+            [{{ index }}]
+
             <template v-if="typeof s.author !== 'undefined' && s.author !== ''">
                 <span class="author">{{ s.author }}</span>,
             </template>
diff --git a/package.json b/package.json
index e1eaaeb..1093d62 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "slidev-addon-bibliography",
-  "version": "1.2.1",
+  "version": "1.2.2",
   "description": "Slidev addon to provide bibliography sources for presentations.",
   "scripts": {
     "dev": "slidev example.md",