diff --git a/src/core/server/http/base_path_proxy_server.ts b/src/core/server/http/base_path_proxy_server.ts
index f5a9d9324cf9844..731f9afdad6ca2b 100644
--- a/src/core/server/http/base_path_proxy_server.ts
+++ b/src/core/server/http/base_path_proxy_server.ts
@@ -103,7 +103,7 @@ export class BasePathProxyServer {
 
     // Register hapi plugin that adds proxying functionality. It can be configured
     // through the route configuration object (see { handler: { proxy: ... } }).
-    await this.server.register([HapiProxy]);
+    await this.server.register(HapiProxy);
 
     if (this.httpConfig.ssl.enabled) {
       const tlsOptions = serverOptions.tls as TlsOptions;
diff --git a/src/core/server/http/cookie_session_storage.ts b/src/core/server/http/cookie_session_storage.ts
index 079edcbe91e7867..e057e978facd62b 100644
--- a/src/core/server/http/cookie_session_storage.ts
+++ b/src/core/server/http/cookie_session_storage.ts
@@ -132,7 +132,7 @@ export async function createCookieSessionStorageFactory<T>(
     }
   }
 
-  await server.register({ plugin: hapiAuthCookie });
+  await server.register(hapiAuthCookie);
 
   server.auth.strategy('security-cookie', 'cookie', {
     cookie: cookieOptions.name,
diff --git a/src/core/server/http/http_server.ts b/src/core/server/http/http_server.ts
index d97907288dd0ad9..f03e9254c851f56 100644
--- a/src/core/server/http/http_server.ts
+++ b/src/core/server/http/http_server.ts
@@ -103,7 +103,7 @@ export class HttpServer {
     const serverOptions = getServerOptions(config);
     const listenerOptions = getListenerOptions(config);
     this.server = createServer(serverOptions, listenerOptions);
-    await this.server.register([HapiStaticFiles]);
+    await this.server.register(HapiStaticFiles);
     this.config = config;
 
     const basePathService = new BasePath(config.basePath);
diff --git a/src/optimize/bundles_route/__tests__/bundles_route.js b/src/optimize/bundles_route/__tests__/bundles_route.js
index 00f1e6cad81b6a2..d342af3bba81fd6 100644
--- a/src/optimize/bundles_route/__tests__/bundles_route.js
+++ b/src/optimize/bundles_route/__tests__/bundles_route.js
@@ -61,7 +61,7 @@ describe('optimizer/bundle route', () => {
     } = options;
 
     const server = new Hapi.Server();
-    server.register([Inert]);
+    server.register(Inert);
 
     server.route(
       createBundlesRoute({