diff --git a/minitool3/Program.cs b/minitool3/Program.cs
index b97cbba..4869d8e 100644
--- a/minitool3/Program.cs
+++ b/minitool3/Program.cs
@@ -87,7 +87,7 @@ namespace minitool3
             aes.Key = sha256Key;
             aes.IV = iv;
             aes.Mode = CipherMode.CBC;
-            aes.Padding = PaddingMode.PKCS7;
+            aes.Padding = PaddingMode.None;
 
             using var decryptor = aes.CreateDecryptor();
             using var memoryStream = new MemoryStream(cipherText);