diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index d6714295..0300e2fe 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -145,6 +145,8 @@ jobs:
       - name: Install Rust
         run: rustup toolchain add nightly --no-self-update && rustup default nightly
       - run: tools/manifest.sh
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
       - run: git add -N . && git diff --exit-code
         if: github.repository_owner != 'taiki-e' || github.event_name != 'schedule' && !(github.event_name == 'push' && github.ref == 'refs/heads/main')
       - id: diff
diff --git a/main.sh b/main.sh
index 4019fee1..bd586dff 100755
--- a/main.sh
+++ b/main.sh
@@ -11,7 +11,7 @@ x() {
     )
 }
 retry() {
-    for i in {1..5}; do
+    for i in {1..10}; do
         if "$@"; then
             return 0
         else
diff --git a/tools/codegen/src/main.rs b/tools/codegen/src/main.rs
index a5f3a502..18b67afd 100644
--- a/tools/codegen/src/main.rs
+++ b/tools/codegen/src/main.rs
@@ -385,24 +385,32 @@ fn replace_vars(s: &str, package: &str, version: &str, platform: HostPlatform) -
 }
 
 fn download(url: &str) -> Result<ureq::Response> {
-    let token = env::var("INTERNAL_CODEGEN_GH_PAT").ok();
+    let mut token1 = env::var("INTERNAL_CODEGEN_GH_PAT").ok().filter(|v| !v.is_empty());
+    let mut token2 = env::var("GITHUB_TOKEN").ok().filter(|v| !v.is_empty());
     let mut retry = 0;
     let mut last_error;
     loop {
         let mut req = ureq::get(url);
-        if let Some(token) = &token {
+        if let Some(token) = &token1 {
+            req = req.set("Authorization", token);
+        } else if let Some(token) = &token2 {
             req = req.set("Authorization", token);
         }
         match req.call() {
             Ok(res) => return Ok(res),
             Err(e) => last_error = Some(e),
         }
+        if token1.is_some() {
+            token1 = None;
+        } else if token2.is_some() {
+            token2 = None;
+        }
         retry += 1;
-        if retry > 5 {
+        if retry > 10 {
             break;
         }
-        eprintln!("download failed; retrying ({retry}/5)");
-        std::thread::sleep(Duration::from_secs(retry * 2));
+        eprintln!("download failed; retrying ({retry}/10)");
+        std::thread::sleep(Duration::from_secs(retry * 4));
     }
     Err(last_error.unwrap().into())
 }