diff --git a/src-pwa/custom-service-worker.ts b/src-pwa/custom-service-worker.ts
index 0dd49d9b..046bfe3e 100644
--- a/src-pwa/custom-service-worker.ts
+++ b/src-pwa/custom-service-worker.ts
@@ -152,7 +152,7 @@ if (process.env.MODE !== "ssr" || process.env.PROD) {
                       }</script>`
                     : "") +
                   `<link rel="canonical" href="${
-                    event.url.protocol + event.url.host
+                    event.url.protocol + "//" + event.url.host
                   }/phim/${id || anime}" />` +
                   "</head>"
               )