diff --git a/themes/learn2/css/.custom.css.swp b/themes/learn2/css/.custom.css.swp
index 14b8112..57d8f14 100644
Binary files a/themes/learn2/css/.custom.css.swp and b/themes/learn2/css/.custom.css.swp differ
diff --git a/themes/learn2/css/custom.css b/themes/learn2/css/custom.css
index d56c9e7..01c79c2 100644
--- a/themes/learn2/css/custom.css
+++ b/themes/learn2/css/custom.css
@@ -57,7 +57,7 @@ body {
 }
 
 /* code blocks */
-pre {
+pre .language-txt {
     background: #222222;
     border: 1px solid #555555;
 }