diff --git a/mRemoteV1/Tools/SecureTransfer.cs b/mRemoteV1/Tools/SecureTransfer.cs
index 62e3a922..2615fbf7 100644
--- a/mRemoteV1/Tools/SecureTransfer.cs
+++ b/mRemoteV1/Tools/SecureTransfer.cs
@@ -7,7 +7,7 @@ using static System.IO.FileMode;
 
 namespace mRemoteNG.Tools
 {
-    class SecureTransfer
+    internal class SecureTransfer
     {
         private readonly string Host;
         private readonly string User;