diff --git a/test_book/src/languages/highlight.md b/test_book/src/languages/highlight.md
index af0f340054..85a48b0c57 100644
--- a/test_book/src/languages/highlight.md
+++ b/test_book/src/languages/highlight.md
@@ -57,7 +57,7 @@ _start:
 
 ## bash
 
-```
+```bash
 #!/bin/bash
 
 ###### CONFIG