diff --git a/Program.cs b/Program.cs
index bb61940..020fecd 100644
--- a/Program.cs
+++ b/Program.cs
@@ -60,7 +60,7 @@
 
     ctx.RequestAborted.ThrowIfCancellationRequested();
 
-    var instructionId = ctx.Request.Headers["id"];
+    string instructionId = ctx.Request.Headers["id"];
     string key = ctx.Request.Headers["apikey"];
 
     ctx.Response.Headers.Add("Content-Type", "application/json");