diff --git a/Program.cs b/Program.cs
index cb90b2c..31e8b6f 100644
--- a/Program.cs
+++ b/Program.cs
@@ -150,17 +150,13 @@ internal static class Program {
                 Description = "Data Type",
                 DefaultValueFactory = _ => "jpeg"
             };
-            dataTypeArgument.CompletionSources.Add(_ => {
-                List<CompletionItem> dataTypes = [];
-                dataTypes.AddRange([
-                    new("description"),
-                    new("format"),
-                    new("jpeg"),
-                    new("json"),
-                    new("sign"),
-                    new("title")]);
-                return dataTypes;
-            });
+            dataTypeArgument.CompletionSources.Add(_ => [
+                new("description"),
+                new("format"),
+                new("jpeg"),
+                new("json"),
+                new("sign"),
+                new("title")]);
             Option<String> outputOption = new("--output", "-o") {
                 Description = "Output File",
                 DefaultValueFactory = _ => "-"