diff --git a/src/_data/elements.js b/src/_data/elements.js
index 28abda8d..5b41b8f8 100644
--- a/src/_data/elements.js
+++ b/src/_data/elements.js
@@ -1,6 +1,7 @@
 import { walk } from "@std/fs/walk";
 
 const srcDir = new URL("../", import.meta.url).pathname;
+/** @type {Record<string, string>} */
 const sources = {};
 
 for await (const entry of walk(srcDir + "components", { match: [/element\.js$/] })) {
diff --git a/src/common/worker.js b/src/common/worker.js
index 1fd9f94a..4da58bdb 100644
--- a/src/common/worker.js
+++ b/src/common/worker.js
@@ -1,3 +1,4 @@
+/// <reference lib="webworker" />
 import { getTransferables } from "@okikio/transferables";
 import { debounceMicrotask } from "@vicary/debounce-microtask";
 import { xxh32 } from "xxh32";