diff --git a/core/apps/accounts/serializers/user.py b/core/apps/accounts/serializers/user.py
index 1e38c7e..28c1111 100644
--- a/core/apps/accounts/serializers/user.py
+++ b/core/apps/accounts/serializers/user.py
@@ -22,7 +22,7 @@ class UserProfileSerializer(serializers.ModelSerializer):
     def update(self, instance, validated_data):
         instance.first_name = validated_data.get('first_name', instance.first_name)
         instance.last_name = validated_data.get('last_name', instance.last_name)
-        instance.username = validated_data.get('first_name', instance.username)
+        instance.username = validated_data.get('username', instance.username)
         instance.profile_image = validated_data.get('profile_image', instance.profile_image)
         instance.save()
         return instance
\ No newline at end of file