diff --git a/judger/src/agent/http.rs b/judger/src/agent/http.rs
index 27db9ce..4432cc2 100644
--- a/judger/src/agent/http.rs
+++ b/judger/src/agent/http.rs
@@ -6,8 +6,19 @@ pub struct HttpClient {
 }
 
 impl HttpClient {
-    pub fn new(base_url: String) -> Self {
-        let client = reqwest::Client::new();
+    pub fn new(base_url: String, internal_token: String) -> Self {
+        let client = reqwest::Client::builder()
+            .default_headers({
+                let mut headers = reqwest::header::HeaderMap::new();
+                headers.insert(
+                    reqwest::header::AUTHORIZATION,
+                    reqwest::header::HeaderValue::from_str(&format!("Bearer {}", internal_token))
+                        .unwrap(),
+                );
+                headers
+            })
+            .build()
+            .unwrap();
         Self { client, base_url }
     }
 
diff --git a/judger/src/agent/platform/mod.rs b/judger/src/agent/platform/mod.rs
index 00026f8..02d1b87 100644
--- a/judger/src/agent/platform/mod.rs
+++ b/judger/src/agent/platform/mod.rs
@@ -6,9 +6,9 @@ pub struct PlatformClient {
 }
 
 impl PlatformClient {
-    pub fn new(base_url: String) -> Self {
+    pub fn new(base_url: String, internal_token: String) -> Self {
         Self {
-            client: HttpClient::new(base_url),
+            client: HttpClient::new(base_url, internal_token),
         }
     }
 
diff --git a/judger/src/main.rs b/judger/src/main.rs
index cb10836..80553ac 100644
--- a/judger/src/main.rs
+++ b/judger/src/main.rs
@@ -36,6 +36,7 @@ async fn main() -> std::io::Result<()> {
     match opt.cmd {
         option::JudgerCommad::Serve {
             platform_uri,
+            internal_token,
             fetch_task_interval,
             port,
         } => {
@@ -44,6 +45,7 @@ async fn main() -> std::io::Result<()> {
                 opt.problem_package_bucket,
                 opt.problem_package_dir,
                 platform_uri.clone(),
+                internal_token,
                 fetch_task_interval,
                 port,
             )
@@ -72,10 +74,11 @@ async fn serve(
     problem_package_bucket: String,
     problem_package_dir: PathBuf,
     platform_uri: String,
+    internal_token: String,
     fetch_task_interval: u64,
     port: u16,
 ) -> std::io::Result<()> {
-    let platform_client = platform::PlatformClient::new(platform_uri.clone());
+    let platform_client = platform::PlatformClient::new(platform_uri.clone(), internal_token);
 
     let worker = match JudgeWorker::new(
         Some(platform_client),
diff --git a/judger/src/option.rs b/judger/src/option.rs
index 179cb1c..d00f0fd 100644
--- a/judger/src/option.rs
+++ b/judger/src/option.rs
@@ -33,6 +33,8 @@ pub enum JudgerCommad {
     Serve {
         #[structopt(env = "PLATFORM_URI", default_value = "http://localhost:8080/")]
         platform_uri: String,
+        #[structopt(env = "INTERNAL_TOKEN", default_value = "internal_token")]
+        internal_token: String,
         /// Interval to fetch task in seconds
         #[structopt(env = "FETCH_TASK_INTERVAL", default_value = "10")]
         fetch_task_interval: u64,