diff --git a/gulp/res/css/themes/mushroom.css b/gulp/res/css/themes/mushroom.css
index 093e8509..91468973 100644
--- a/gulp/res/css/themes/mushroom.css
+++ b/gulp/res/css/themes/mushroom.css
@@ -29,27 +29,21 @@
 	--greentext-color: #789922;
 	--pinktext-color: #e0727f;
 }
-
 body {
-	background-image: url("/file/mushroom.png");
+	background: var(--background-rest) url("/file/mushroom.png");
 }
-
 a.post-name {
 	color: #a0ffff;
 }
-
 a.quote {
 	color: #81a2be;
 }
-
 table {
 	border: 1px solid var(--box-border-color);
 }
-
 tr {
-	background-image: url("/file/mushroom.png");
+	background: var(--background-rest) url("/file/mushroom.png");
 }
-
 .captcha {
 	filter: invert(90%);
 }
\ No newline at end of file