diff --git a/README.md b/README.md
index 417c621..467b434 100644
--- a/README.md
+++ b/README.md
@@ -150,7 +150,7 @@ In order to be compatible with IOS , we make the following convention  on Object
 
 In Swift, you should declare APIs as follows:
 
-```
+```swift
 //MUST USE "_" to ignore the first argument name explicitly。
 @objc func testSyn( _ arg:String) -> String {
 	return String(format:"%@[Swift sync call:%@]", arg, "test")
diff --git a/readme-chs.md b/readme-chs.md
index eedd674..0ad2655 100644
--- a/readme-chs.md
+++ b/readme-chs.md
@@ -129,7 +129,7 @@ pod "dsBridge"
 
 在 Swift中，你应该按照如下方式声明APIs:
 
-```
+```swift
 //必须给第一个参数前添加下划线"_"来显式忽略参数名。
 @objc func testSyn( _ arg:String) -> String {
 	return String(format:"%@[Swift sync call:%@]", arg, "test")