diff --git a/docs/system-design/framework/spring/spring-transaction.md b/docs/system-design/framework/spring/spring-transaction.md
index cd9db83b..d30269d3 100644
--- a/docs/system-design/framework/spring/spring-transaction.md
+++ b/docs/system-design/framework/spring/spring-transaction.md
@@ -417,6 +417,7 @@ Class B {
        //do something
     }
 }
+```
 
 **4.`TransactionDefinition.PROPAGATION_MANDATORY`**