diff --git a/docusaurus.config.js b/docusaurus.config.js
index 721f895..78bb476 100644
--- a/docusaurus.config.js
+++ b/docusaurus.config.js
@@ -66,7 +66,7 @@ const config = {
         /** @type {import('@docusaurus/preset-classic').ThemeConfig} */
         ({
             // Replace with your project's social card
-            image: "img/docusaurus-social-card.jpg",
+            image: "img/SCAICT-social-card.png",
             navbar: {
                 title: "SCAICT 說明文件",
                 logo: {
diff --git a/static/img/SCAICT_social-card.png b/static/img/SCAICT_social-card.png
new file mode 100644
index 0000000..a1d5030
Binary files /dev/null and b/static/img/SCAICT_social-card.png differ
diff --git a/static/img/docusaurus-social-card.jpg b/static/img/docusaurus-social-card.jpg
deleted file mode 100644
index ffcb448..0000000
Binary files a/static/img/docusaurus-social-card.jpg and /dev/null differ