diff --git a/static/images/ogp/cosin_icon_2018.png b/assets/images/ogp/cosin_icon_2018.png
similarity index 100%
rename from static/images/ogp/cosin_icon_2018.png
rename to assets/images/ogp/cosin_icon_2018.png
diff --git a/static/images/ogp/cosin_icon_2019.png b/assets/images/ogp/cosin_icon_2019.png
similarity index 100%
rename from static/images/ogp/cosin_icon_2019.png
rename to assets/images/ogp/cosin_icon_2019.png
diff --git a/static/images/ogp/cosin_icon_2020.png b/assets/images/ogp/cosin_icon_2020.png
similarity index 100%
rename from static/images/ogp/cosin_icon_2020.png
rename to assets/images/ogp/cosin_icon_2020.png
diff --git a/static/images/ogp/cosin_icon_2021.png b/assets/images/ogp/cosin_icon_2021.png
similarity index 100%
rename from static/images/ogp/cosin_icon_2021.png
rename to assets/images/ogp/cosin_icon_2021.png
diff --git a/static/images/ogp/cosin_icon_2024.png b/assets/images/ogp/cosin_icon_2024.png
similarity index 100%
rename from static/images/ogp/cosin_icon_2024.png
rename to assets/images/ogp/cosin_icon_2024.png
diff --git a/assets/images/ogp/cosin_icon_generic.png b/assets/images/ogp/cosin_icon_generic.png
new file mode 100644
index 0000000..acf6ed2
Binary files /dev/null and b/assets/images/ogp/cosin_icon_generic.png differ
diff --git a/layouts/_default/baseof.html b/layouts/_default/baseof.html
index 19378d0..9021e29 100644
--- a/layouts/_default/baseof.html
+++ b/layouts/_default/baseof.html
@@ -13,10 +13,17 @@
     <meta property="og:site_name" content="{{ .Site.Title }}"/>
     <meta property="og:title" content="{{ .Title }}"/>
     <meta property="og:url" content="{{ .Permalink | absURL }}"/>
-    <meta property="og:image" content="{{ printf "images/ogp/cosin_icon_%s.png" (string .Site.Data.cosin.date_year) | absURL }}"/>
-    <meta property="og:image:type" content="image/png"/>
-    <meta property="og:image:width" content="128"/>
-    <meta property="og:image:height" content="128"/>
+    {{ $logoFile := printf "images/ogp/cosin_icon_%s.png" (string .Site.Data.cosin.date_year) }}
+    {{ $logo := "" }}
+    {{ with resources.Get $logoFile }}
+      {{ $logo = . }}
+    {{ else }}
+      {{ $logo = resources.Get "images/ogp/cosin_icon_generic.png" }}
+    {{ end }}
+    <meta property="og:image" content="{{ $logo | absURL }}"/>
+    <meta property="og:image:type" content="{{ $logo.MediaType }}"/>
+    <meta property="og:image:width" content="{{ $logo.Width }}"/>
+    <meta property="og:image:height" content="{{ $logo.Height }}"/>
     <meta property="og:image:alt" content="CoSin Icon {{ string .Site.Data.cosin.date_year }}"/>
 
   </head>