diff --git a/src/main/java/io/github/devopsws/demo/service/StringService.java b/src/main/java/io/github/devopsws/demo/service/StringService.java
index f1e5a3e..e2b0300 100644
--- a/src/main/java/io/github/devopsws/demo/service/StringService.java
+++ b/src/main/java/io/github/devopsws/demo/service/StringService.java
@@ -8,6 +8,6 @@
 public class StringService {
     @GetMapping("/lower")
     public String lower(@RequestParam(required = true) String text) {
-        return text.toLowerCase();
+        return text;
     }
 }