diff --git a/src/libs/axios.ts b/src/libs/axios.ts
index 15127ec..b75e989 100644
--- a/src/libs/axios.ts
+++ b/src/libs/axios.ts
@@ -78,7 +78,8 @@ export const transformObjectKeys = (obj: any): any => {
       let transformedKey = key
 
       // Handle uppercase snake_case (e.g., USER_NAME -> userName)
-      if (/^[A-Z_]+$/.test(key)) {
+      // Handle lowercase snake_case (e.g., user_name -> userName)
+      if (/^[A-Z_]+$/.test(key) || /^[a-z_]+$/.test(key)) {
         transformedKey = snakeToCamel(key)
       }
       // Handle single uppercase word (e.g., ROLE -> role)