diff --git a/aio/ngsw-manifest.json b/aio/ngsw-manifest.json
index 755ef5197c..55a2a0ae74 100644
--- a/aio/ngsw-manifest.json
+++ b/aio/ngsw-manifest.json
@@ -8,16 +8,8 @@
     "index": "/index.html",
     "routes": {
       "/": {
-        "prefix": false
-      },
-      "/about": {
-        "prefix": true
-      },
-      "/tutorial": {
-        "prefix": true
-      },
-      "/guide": {
-        "prefix": true
+        "prefix": true,
+        "onlyWithoutExtension": true
       }
     }
   }