diff --git a/src/WingetCreateCLI/PromptHelper.cs b/src/WingetCreateCLI/PromptHelper.cs
index a5923d47..2a26f074 100644
--- a/src/WingetCreateCLI/PromptHelper.cs
+++ b/src/WingetCreateCLI/PromptHelper.cs
@@ -416,7 +416,7 @@ public static void PromptList<T>(string message, object model, string memberName
                     // Trim values if we have List<string>
                     if (instanceType == typeof(string))
                     {
-                        value = (IEnumerable<T>)value.Select(v => v.ToString().Trim());
+                        value = (IEnumerable<T>)value.Select(v => v.ToString().Trim()).ToList();
                     }
                 }