lib/generators/serviceworker/templates/serviceworker.js in serviceworker-rails-0.5.2 vs lib/generators/serviceworker/templates/serviceworker.js in serviceworker-rails-0.5.3

@@ -27,10 +27,10 @@
       return Promise.all(
         cacheNames.filter(function(cacheName) {
           // Return true if you want to remove this cache,
           // but remember that caches are shared across
           // the whole origin
-          return key.indexOf(CACHE_VERSION) !== 0;
+          return cacheName.indexOf(CACHE_VERSION) !== 0;
         }).map(function(cacheName) {
           return caches.delete(cacheName);
         })
       );
     })