diff --git a/BasicNodes/File/CopyFile.cs b/BasicNodes/File/CopyFile.cs
index 3f24713a..20bfa561 100644
--- a/BasicNodes/File/CopyFile.cs
+++ b/BasicNodes/File/CopyFile.cs
@@ -130,8 +130,8 @@ namespace FileFlows.BasicNodes.File
                         oCreateTimeUtc is DateTime dtCreateTimeUtc && oLastWriteUtc is DateTime dtLastWriteUtc)
                     {
                         args.Logger?.ILog("Preserving dates");
-                        Helpers.FileHelper.SetLastWriteTime(dest, dtLastWriteUtc);
-                        Helpers.FileHelper.SetCreationTime(dest, dtCreateTimeUtc);
+                        args.FileService.SetLastWriteTimeUtc(dest, dtLastWriteUtc);
+                        args.FileService.SetCreationTimeUtc(dest, dtCreateTimeUtc);
                     }
                     else
                     {
diff --git a/BasicNodes/File/MoveFile.cs b/BasicNodes/File/MoveFile.cs
index 87d2f6a0..365293d3 100644
--- a/BasicNodes/File/MoveFile.cs
+++ b/BasicNodes/File/MoveFile.cs
@@ -144,8 +144,8 @@ public class MoveFile : Node
                 oCreateTimeUtc is DateTime dtCreateTimeUtc && oLastWriteUtc is DateTime dtLastWriteUtc)
             {
                 args.Logger?.ILog("Preserving dates");
-                Helpers.FileHelper.SetLastWriteTime(dest, dtLastWriteUtc);
-                Helpers.FileHelper.SetCreationTime(dest, dtCreateTimeUtc);
+                args.FileService.SetLastWriteTimeUtc(dest, dtLastWriteUtc);
+                args.FileService.SetCreationTimeUtc(dest, dtCreateTimeUtc);
             }
             else
             {