diff --git a/src/future/postmark/PhutilPostmarkFuture.php b/src/future/postmark/PhutilPostmarkFuture.php
--- a/src/future/postmark/PhutilPostmarkFuture.php
+++ b/src/future/postmark/PhutilPostmarkFuture.php
@@ -6,6 +6,7 @@
   private $accessToken;
   private $method;
   private $parameters;
+  private $timeout;
 
   public function __construct() {
     parent::__construct(null);
@@ -27,6 +28,15 @@
     return $this;
   }
 
+  public function setTimeout($timeout) {
+    $this->timeout = $timeout;
+    return $this;
+  }
+
+  public function getTimeout() {
+    return $this->timeout;
+  }
+
   protected function getProxiedFuture() {
     if (!$this->future) {
       if ($this->accessToken === null) {
@@ -49,6 +59,11 @@
         ->addHeader('Accept', 'application/json')
         ->addHeader('Content-Type', 'application/json');
 
+      $timeout = $this->getTimeout();
+      if ($timeout) {
+        $future->setTimeout($timeout);
+      }
+
       $this->future = $future;
     }