diff --git a/Program.cs b/Program.cs
index 0df4266..284648d 100644
--- a/Program.cs
+++ b/Program.cs
@@ -586,7 +586,7 @@ namespace domain_utility
         static void Main(string[] args)
         {
             Console.Title = Assembly.GetExecutingAssembly().GetCustomAttribute<AssemblyTitleAttribute>().Title;
-            if (args[0] == "reboot")
+            if (args.Length > 0 && args[0] == "reboot")
             {
                 StartRestartComputers();
                 return;