diff --git a/public/sw.js b/public/sw.js
index 4053adc..8a7e201 100644
--- a/public/sw.js
+++ b/public/sw.js
@@ -6,7 +6,7 @@
 
 var self_ = /** @type {ServiceWorkerGlobalScope & typeof globalThis} */ (self);
 
-const CACHE_KEY = "v2";
+const CACHE_KEY = "v3";
 
 /**
  *
diff --git a/src/main.worker.ts b/src/main.worker.ts
index 4b9448c..b468c9d 100644
--- a/src/main.worker.ts
+++ b/src/main.worker.ts
@@ -12,7 +12,7 @@ const jsModule = import(  /* @vite-ignore */ `${wasmBase}clangd.js`);
 
 // Pre-fetch wasm, and report progress to main
 const wasmResponse = await fetch(wasmUrl);
-const wasmSize = wasmResponse.headers.get("Content-Length") ?? __WASM_SIZE__;
+const wasmSize = __WASM_SIZE__;
 const wasmReader = wasmResponse.body!.getReader();
 let receivedLength = 0;
 let chunks: Uint8Array[] = [];
diff --git a/vite.config.ts b/vite.config.ts
index 287c012..f342157 100644
--- a/vite.config.ts
+++ b/vite.config.ts
@@ -30,7 +30,7 @@ export default defineConfig({
     dedupe: ['monaco-editor', 'vscode']
   },
   define: {
-    // Server may not provide Content-Length header, get it in build time
+    // Server-provided Content-Length header may be gzipped, get the real size in build time
     __WASM_SIZE__: fs.statSync("public/wasm/clangd.wasm").size,
   }
 });