diff --git a/gui/theme/watch_mdpi/ui.xml b/gui/theme/watch_mdpi/ui.xml
index bad23c0..c56610b 100644
--- a/gui/theme/watch_mdpi/ui.xml
+++ b/gui/theme/watch_mdpi/ui.xml
@@ -6,7 +6,7 @@
 		<author>TeamWin</author>
 		<title>Backup Naowz</title>
 		<description>Default basic theme</description>
-		<preview>preview.jpg</preview>
+		<preview>preview.png</preview>
 		<themeversion>1</themeversion>
 	</details>