diff --git a/args.ts b/args.ts
index 2f30085..608612e 100644
--- a/args.ts
+++ b/args.ts
@@ -1,3 +1,4 @@
+
 import { Args } from "./deps.ts";
 import { isRecordType, ServerOptions } from "./lib/utils.ts";
 /**
@@ -36,7 +37,7 @@ export function parseArgs(args: Args): arguments {
     }
 
     if (isRecordType(arg)) {
-      parsed.type = arg;
+      parsed.type = arg.toUpperCase() as Deno.RecordType;
       return;
     }
 
diff --git a/lib/utils.ts b/lib/utils.ts
index 8709d54..0ce5b53 100644
--- a/lib/utils.ts
+++ b/lib/utils.ts
@@ -24,9 +24,9 @@ export type ServerOptions = {
 };
 
 export function isRecordType(type: string): type is Deno.RecordType {
-  return type === "A" || type === "AAAA" || type === "CNAME" || type === "MX" ||
-    type === "NS" || type === "PTR" || type === "SOA" || type === "TXT" ||
-    type === "NAPTR" || type === "SRV";
+  return type.toUpperCase() === "A" || type.toUpperCase() === "AAAA" || type.toUpperCase() === "CNAME" || type.toUpperCase() === "MX" ||
+    type.toUpperCase() === "NS" || type.toUpperCase() === "PTR" || type.toUpperCase() === "SOA" || type.toUpperCase() === "TXT" ||
+    type.toUpperCase() === "NAPTR" || type.toUpperCase() === "SRV" || type.toUpperCase() === "CAA";
 }
 
 /**