diff --git a/src/files/service-worker.js b/src/files/service-worker.js
index dc3cfe4..15f3193 100644
--- a/src/files/service-worker.js
+++ b/src/files/service-worker.js
@@ -31,8 +31,8 @@ export const createServiceWorker = async (context, config, queue, options) => {
         return urls
       }, {})
     };
-    if (config.modifyServiceWorkerConfig) {
-      config.modifyServiceWorkerConfig(swConfig);
+    if (options.modifyServiceWorkerConfig) {
+      options.modifyServiceWorkerConfig(swConfig);
     }
     await generateSW(swConfig);