diff --git a/back/Contracts/Mappers/ChangeRecordMapper.cs b/back/Contracts/Mappers/ChangeRecordMapper.cs
index a6075c4..606344d 100644
--- a/back/Contracts/Mappers/ChangeRecordMapper.cs
+++ b/back/Contracts/Mappers/ChangeRecordMapper.cs
@@ -5,11 +5,11 @@ namespace Contracts.Mappers;
 
 public static class ChangeRecordMapper
 {
-    public static ChangeRecordViewModel ToView(this ChangeRecordDto changeRecord) 
+    public static ChangeRecordViewModel ToView(this ChangeRecordDto dto) 
         => new() 
         { 
-            Id = changeRecord.Id, 
-            Sum = changeRecord.Sum, 
-            ChangedAt = changeRecord.ChangedAt 
+            Id = dto.Id, 
+            Sum = dto.Sum, 
+            ChangedAt = dto.ChangedAt 
         }; 
 }
\ No newline at end of file
diff --git a/back/Contracts/Mappers/SpendingGroupMapper.cs b/back/Contracts/Mappers/SpendingGroupMapper.cs
index 92877a5..f9d4cac 100644
--- a/back/Contracts/Mappers/SpendingGroupMapper.cs
+++ b/back/Contracts/Mappers/SpendingGroupMapper.cs
@@ -5,11 +5,11 @@ namespace Contracts.Mappers;
 
 public static class SpendingGroupMapper
 {
-    public static SpendingGroupViewModel ToView(this SpendingGroupDto spendingGroup) 
+    public static SpendingGroupViewModel ToView(this SpendingGroupDto dto) 
         => new() 
         { 
-            Id = spendingGroup.Id, 
-            Name = spendingGroup.Name,
-            ChangeRecords = spendingGroup.ChangeRecords.Select(x => x.ToView()).ToList()
+            Id = dto.Id, 
+            Name = dto.Name,
+            ChangeRecords = dto.ChangeRecords.Select(x => x.ToView()).ToList()
         };
 }
\ No newline at end of file