diff --git a/packages/eui/changelogs/upcoming/9089.md b/packages/eui/changelogs/upcoming/9089.md
new file mode 100644
index 00000000000..50be925bb8d
--- /dev/null
+++ b/packages/eui/changelogs/upcoming/9089.md
@@ -0,0 +1,3 @@
+**Bug fixes**
+
+- Fixed `prismjs` theme in `EuiCodeBlock` to improve highlighting for the `yaml` language
diff --git a/packages/eui/src/components/code/code_syntax.styles.ts b/packages/eui/src/components/code/code_syntax.styles.ts
index c212a401d04..6c704c4a635 100644
--- a/packages/eui/src/components/code/code_syntax.styles.ts
+++ b/packages/eui/src/components/code/code_syntax.styles.ts
@@ -91,6 +91,7 @@ export const euiCodeSyntaxVariables = (euiThemeContext: UseEuiTheme) => {
   }
 
   .token.atrule .token.rule,
+  .token.key.atrule,
   .token.keyword {
     color: ${this.keywordColor};
   }