diff --git a/Cloud9-Instructions.md b/Cloud9-Instructions.md
index 2a2ce88..8f596ca 100644
--- a/Cloud9-Instructions.md
+++ b/Cloud9-Instructions.md
@@ -2,7 +2,7 @@ In a workspace:
 1. Click **Cloud9**, then **Preferences** (or use keyboard shortcut <kbd>CTRL</kbd> + <kbd>,</kbd>)
 2. Go to **Themes**, then click on **You can also style Cloud9 by editing _your stylesheet_** (this will open a blank _styles.css_ file in the C9 editor)
 3. Copy & paste the following:
-```
+```css
 @font-face{
     font-family: 'Fira Code';
     src: url('https://raw.githubusercontent.com/tonsky/FiraCode/5.2/distr/woff2/FiraCode-Regular.woff2') format('woff2'),