diff --git a/handleRequest.ts b/handleRequest.ts
index 4ed2f23..ff3472a 100644
--- a/handleRequest.ts
+++ b/handleRequest.ts
@@ -137,11 +137,15 @@ async function resolvePluginOrSchemaUrl(url: URL) {
 
 function getAccessControlAllowOrigin(request: Request) {
   const origin = request.headers.get("origin");
-  return origin != null && new URL(origin).hostname === "localhost"
+  return origin != null && isAllowedLocalHostname(new URL(origin).hostname)
     ? origin
     : "https://dprint.dev";
 }
 
+function isAllowedLocalHostname(hostname: string) {
+  return hostname === "localhost" || hostname === "127.0.0.1";
+}
+
 function shouldDirectlyServeFile(request: Request) {
   // directly serve for when Deno makes a request in order to fix the content type
   if (request.headers.get("user-agent")?.startsWith("Deno/")) {