diff --git a/src/components/demo/GithubLink/index.vue b/src/components/demo/GithubLink/index.vue
index 353f41c5..f174b715 100644
--- a/src/components/demo/GithubLink/index.vue
+++ b/src/components/demo/GithubLink/index.vue
@@ -11,9 +11,13 @@
 export default {
   props: {
     url: {
+      type: String,
+      required: false,
       default: 'https://github.com/FairyEver'
     },
     tooltipPlacement: {
+      type: String,
+      required: false,
       default: 'top-end'
     }
   }
diff --git a/src/components/demo/PageHeader/index.vue b/src/components/demo/PageHeader/index.vue
index 59495854..faf0cf2b 100644
--- a/src/components/demo/PageHeader/index.vue
+++ b/src/components/demo/PageHeader/index.vue
@@ -1,7 +1,9 @@
 <template>
   <div class="dd-clearfix">
     <span v-if="title" class="dd-fl">{{title}}</span>
-    <span v-if="url" class="dd-fr"><GithubLink :url="url"></GithubLink></span>
+    <span class="dd-fr">
+      <GithubLink v-if="url" :url="url"></GithubLink>
+    </span>
   </div>
 </template>