diff --git a/packages/core/http/core-http-router-server-internal/src/router.ts b/packages/core/http/core-http-router-server-internal/src/router.ts
index f16d8bcf64def..27fd5d83c2dbb 100644
--- a/packages/core/http/core-http-router-server-internal/src/router.ts
+++ b/packages/core/http/core-http-router-server-internal/src/router.ts
@@ -240,7 +240,7 @@ export class Router<Context extends RequestHandlerContextBase = RequestHandlerCo
     if (excludeVersionedRoutes) {
       return this.routes.filter((route) => !route.isVersioned);
     }
-    return this.routes;
+    return [...this.routes];
   }
 
   public handleLegacyErrors = wrapErrors;