diff --git a/themes/learn2/css/custom.css b/themes/learn2/css/custom.css
index 4df9f1b..7bdd589 100644
--- a/themes/learn2/css/custom.css
+++ b/themes/learn2/css/custom.css
@@ -43,9 +43,9 @@ Put your custom CSS in this file.
 }
 
 body {
-    background: #111111;
+    background-color: #111111;
 }
 
 .bg {
-    background: #111111;
+    background-color: #111111;
 }