diff --git a/packages/opencode/src/tool/webfetch.ts b/packages/opencode/src/tool/webfetch.ts
index bca97e50..b0010c4d 100644
--- a/packages/opencode/src/tool/webfetch.ts
+++ b/packages/opencode/src/tool/webfetch.ts
@@ -44,7 +44,11 @@ export const WebFetchTool = Tool.define({
     const response = await fetch(params.url, {
       signal: controller.signal,
       headers: {
-        "User-Agent": "opencode/1.0",
+        "User-Agent":
+          "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36",
+        Accept:
+          "text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8",
+        "Accept-Language": "en-US,en;q=0.9",
       },
     })