diff --git a/WorkWithGaussian/README.md b/WorkWithGaussian/README.md
index 8f4a84c..5545c7a 100644
--- a/WorkWithGaussian/README.md
+++ b/WorkWithGaussian/README.md
@@ -5,8 +5,3 @@ When you need to use one, just put the file in that folder and double click it.
 
 Good luck~
 
-```css
-.markdown-preview.markdown-preview {
-  background-color: #444;
-}
-```