diff --git a/types/index.d.ts b/types/index.d.ts
index c352556..963bae0 100644
--- a/types/index.d.ts
+++ b/types/index.d.ts
@@ -77,7 +77,7 @@ declare namespace fastifyStatic {
   }
 
   export interface FastifyStaticOptions extends SendOptions {
-    root: string | string[];
+    root: string | string[] | URL | URL[];
     prefix?: string;
     prefixAvoidTrailingSlash?: boolean;
     serve?: boolean;
diff --git a/types/index.test-d.ts b/types/index.test-d.ts
index 883a878..c370ebf 100644
--- a/types/index.test-d.ts
+++ b/types/index.test-d.ts
@@ -97,6 +97,18 @@ expectError<FastifyStaticOptions>({
   }
 })
 
+expectAssignable<FastifyStaticOptions>({
+  root: ['']
+})
+
+expectAssignable<FastifyStaticOptions>({
+  root: new URL('')
+})
+
+expectAssignable<FastifyStaticOptions>({
+  root: [new URL('')]
+})
+
 appWithImplicitHttp
   .register(fastifyStatic, options)
   .after(() => {
@@ -170,6 +182,16 @@ noIndexApp
     })
   })
 
+options.root = new URL('')
+
+const URLRootApp = fastify()
+URLRootApp.register(fastifyStatic, options)
+  .after(() => {
+    URLRootApp.get('/', (request, reply) => {
+      reply.send('<h1>fastify-static</h1>')
+    })
+  })
+
 const defaultIndexApp = fastify()
 options.index = 'index.html'