diff --git a/src/activities/Elsa.Activities.File/Activities/OutFile/OutFile.cs b/src/activities/Elsa.Activities.File/Activities/OutFile/OutFile.cs
index e63694702..8017f0f83 100644
--- a/src/activities/Elsa.Activities.File/Activities/OutFile/OutFile.cs
+++ b/src/activities/Elsa.Activities.File/Activities/OutFile/OutFile.cs
@@ -17,7 +17,7 @@ namespace Elsa.Activities.File
         Outcomes = new[] { OutcomeNames.Done })]
     public class OutFile : Activity
     {
-        [ActivityInput(Hint = "Bytes to write to file.", SupportedSyntaxes = new[] { SyntaxNames.JavaScript, SyntaxNames.Liquid })]
+        [ActivityInput(Hint = "Bytes to write to file.", SupportedSyntaxes = new[] { SyntaxNames.JavaScript }, DefaultSyntax = SyntaxNames.JavaScript)]
         public byte[] Bytes { get; set; }
 
         [ActivityInput(Hint = "Path to create file at.", UIHint = ActivityInputUIHints.SingleLine, SupportedSyntaxes = new[] { SyntaxNames.JavaScript, SyntaxNames.Liquid })]