diff --git a/contrib/static/bg.jpg b/contrib/static/bg.jpg
deleted file mode 100644
index f5c89a9..0000000
Binary files a/contrib/static/bg.jpg and /dev/null differ
diff --git a/contrib/static/bg.png b/contrib/static/bg.png
new file mode 100644
index 0000000..b7731aa
Binary files /dev/null and b/contrib/static/bg.png differ
diff --git a/contrib/static/site.css b/contrib/static/site.css
index 9b31138..b188951 100644
--- a/contrib/static/site.css
+++ b/contrib/static/site.css
@@ -106,7 +106,7 @@ th {
 
 html {
     color: #ededed;
-    background: #695D81 url("/static/bg.jpg");
+    background: #695D81 url("/static/bg.png");
     height: 100%;
     background-attachment: fixed;
     background-blend-mode: overlay;