diff --git a/to_lower_case/yunalee.java b/to_lower_case/yunalee.java
new file mode 100644
index 0000000000..8f0c2a9c26
--- /dev/null
+++ b/to_lower_case/yunalee.java
@@ -0,0 +1,5 @@
+class Solution {
+    public String toLowerCase(String s) {
+        return s.toLowerCase();
+    }
+}