diff --git a/docs/README_ja.md b/docs/README_ja.md
index e1672ee..a7d8b8b 100644
--- a/docs/README_ja.md
+++ b/docs/README_ja.md
@@ -84,7 +84,7 @@ Apple の Virtualization.framework と PCC の研究用 VM インフラを使用
 **依存関係のインストール:**
 
 ```bash
-brew install aria2 wget gnu-tar openssl@3 ldid-procursus sshpass keystone libusb ipsw
+brew install aria2 wget gnu-tar openssl@3 ldid-procursus sshpass keystone libusb ipsw zstd
 ```
 
 `scripts/fw_prepare.sh` は高速な多重接続ダウンロードのために `aria2c` を優先し、必要に応じて `curl` または `wget` にフォールバックします。
diff --git a/docs/README_ko.md b/docs/README_ko.md
index 21a4d41..0754be9 100644
--- a/docs/README_ko.md
+++ b/docs/README_ko.md
@@ -84,7 +84,7 @@ PCC 리서치 VM 인프라와 Apple의 Virtualization.framework를 사용하여
 **의존성(Dependencies) 설치:**
 
 ```bash
-brew install aria2 wget gnu-tar openssl@3 ldid-procursus sshpass keystone libusb ipsw
+brew install aria2 wget gnu-tar openssl@3 ldid-procursus sshpass keystone libusb ipsw zstd
 ```
 
 `scripts/fw_prepare.sh` 는 더 빠른 다중 연결 다운로드를 위해 `aria2c` 를 우선 사용하고, 필요하면 `curl` 또는 `wget` 으로 폴백합니다.
diff --git a/docs/README_zh.md b/docs/README_zh.md
index ac99ec2..7a022ce 100644
--- a/docs/README_zh.md
+++ b/docs/README_zh.md
@@ -84,7 +84,7 @@
 **安装依赖：**
 
 ```bash
-brew install aria2 wget gnu-tar openssl@3 ldid-procursus sshpass keystone libusb ipsw
+brew install aria2 wget gnu-tar openssl@3 ldid-procursus sshpass keystone libusb ipsw zstd
 ```
 
 `scripts/fw_prepare.sh` 会优先使用 `aria2c` 进行更快的多连接下载，必要时再回退到 `curl` 或 `wget`。
diff --git a/scripts/setup_tools.sh b/scripts/setup_tools.sh
index e794261..05484cd 100755
--- a/scripts/setup_tools.sh
+++ b/scripts/setup_tools.sh
@@ -27,7 +27,7 @@ ensure_repo_submodule() {
 
 echo "[1/5] Checking brew packages..."
 
-BREW_PACKAGES=(aria2 gnu-tar openssl@3 ldid-procursus sshpass)
+BREW_PACKAGES=(aria2 gnu-tar openssl@3 ldid-procursus sshpass zstd)
 BREW_MISSING=()
 
 for pkg in "${BREW_PACKAGES[@]}"; do