diff --git a/README.md b/README.md
index 9485a41..ee95bc4 100644
--- a/README.md
+++ b/README.md
@@ -3,7 +3,7 @@
 [![Vapor Version](https://img.shields.io/badge/Vapor-4-F6CBCA.svg)](http://vapor.codes)
 [![build](https://github.com/alexsteinerde/graphiql-vapor/workflows/build/badge.svg)](https://github.com/alexsteinerde/graphiql-vapor/actions)
 
-This package ships functionality to add the [GraphiQL](https://github.com/graphql/graphiql) GraphQL web editor and request-tester page to an `Application` instance in Vapor.
+This package ships functionality to add the [GraphiQL](https://github.com/graphql/graphiql) GraphQL web editor and request-tester page to an `RoutesBuilder` instance in Vapor.
 
 ## Installation
 ```swift
@@ -30,7 +30,7 @@ let package = Package(
 app.enableGraphiQL()
 
 ```
-This will register the web page on `GET /`. If you want to have GraphiQL available on another route, call `app.enableGraphiQL(on: "/graphiQL)` instead.
+This will register the web page on `GET /`. If you want to have GraphiQL available on another route, call `app.enableGraphiQL(on: "/graphiQL)` or `app.grouped("graphiQL").enableGraphiQL()` instead.
 
 ## License
 This project is available under the MIT license. See the LICENSE file for more info.
diff --git a/Sources/GraphiQLVapor/GraphiQLVapor.swift b/Sources/GraphiQLVapor/GraphiQLVapor.swift
index 64d9843..2491086 100644
--- a/Sources/GraphiQLVapor/GraphiQLVapor.swift
+++ b/Sources/GraphiQLVapor/GraphiQLVapor.swift
@@ -6,7 +6,7 @@ extension Request {
     }
 }
 
-public extension Application {
+public extension RoutesBuilder {
     func enableGraphiQL(on pathComponents: PathComponent..., method: HTTPMethod = .GET, credentials: GraphiQLCredentialMode = .sameOrigin, serverPath: PathComponent = "/graphql") {
         self.on(method, pathComponents) { (request) -> Response in
             request.serve(html: grahphiQLHTML(path: serverPath, credentialMode: credentials))
diff --git a/Tests/GraphiQLVaporTests/GraphiQLVaporTests.swift b/Tests/GraphiQLVaporTests/GraphiQLVaporTests.swift
index d0123c4..0dd9b22 100644
--- a/Tests/GraphiQLVaporTests/GraphiQLVaporTests.swift
+++ b/Tests/GraphiQLVaporTests/GraphiQLVaporTests.swift
@@ -25,4 +25,15 @@ final class GraphiQLVaporTests: XCTestCase {
             XCTAssertEqual(res.status, HTTPResponseStatus.ok)
         }
     }
+    
+    func testRegisterOnRoutesBuilder() throws {
+        let app = Application(.testing)
+        defer { app.shutdown() }
+
+        app.grouped("test").enableGraphiQL()
+
+        try app.testable().test(.GET, "/test") { res in
+            XCTAssertEqual(res.status, HTTPResponseStatus.ok)
+        }
+    }
 }