diff --git a/ngsw-config.json b/ngsw-config.json
index 4e9dd0a..57dac9f 100644
--- a/ngsw-config.json
+++ b/ngsw-config.json
@@ -14,17 +14,29 @@
           "/*.js"
         ]
       }
-    }, {
+    },
+    {
       "name": "assets",
       "installMode": "lazy",
       "updateMode": "prefetch",
       "resources": {
         "files": [
           "/assets/**",
-          "/data/**",
           "/*.(eot|svg|cur|jpg|png|webp|gif|otf|ttf|woff|woff2|ani)"
         ]
       }
     }
+  ],
+  "dataGroups": [
+    {
+      "urls": [
+        "/data/**/*.(eot|svg|cur|jpg|png|webp|gif|otf|ttf|woff|woff2|ani)"
+      ],
+      "cacheConfig": {
+        "maxSize": 250,
+        "maxAge": "7d"
+      },
+      "name": "userDefinedResources"
+    }
   ]
 }