diff --git a/app/css/app.css b/app/css/app.css
index 80e703f..6721887 100644
--- a/app/css/app.css
+++ b/app/css/app.css
@@ -192,7 +192,7 @@ h1 span:after {
 .not-found+.minifo {
     height: 150px;
     border-bottom: 2px solid #000;
-    background: url(../images/404.png) no-repeat center bottom;
+    background: url(../images/404.jpg) no-repeat center bottom;
     background-size: auto 100%;
 }
 .summary, .authorinfo, .taglist {
diff --git a/app/images/404.jpg b/app/images/404.jpg
new file mode 100644
index 0000000..c12a665
Binary files /dev/null and b/app/images/404.jpg differ
diff --git a/app/images/404.png b/app/images/404.png
deleted file mode 100644
index d415e76..0000000
Binary files a/app/images/404.png and /dev/null differ