diff --git a/User-Contributed-CSS-Themes.md b/User-Contributed-CSS-Themes.md
index 3532f16..6f249ee 100644
--- a/User-Contributed-CSS-Themes.md
+++ b/User-Contributed-CSS-Themes.md
@@ -513,7 +513,7 @@ a:link h3 div {
 
 ### ChatGPT Theme (by @bbf6 -- [screenshots](https://github.com/benbusby/whoogle-search/issues/1148))
 
-```
+```css
 :root {
     /* LIGHT THEME COLORS */
     --whoogle-logo: #10a37f;