diff --git a/README.md b/README.md
index 2b46c0c..fc94dd8 100644
--- a/README.md
+++ b/README.md
@@ -248,6 +248,7 @@ MultiCurl::complete($callback)
 MultiCurl::error($callback)
 MultiCurl::getOpt($option)
 MultiCurl::setBasicAuthentication($username, $password = '')
+MultiCurl::setConcurrency($concurrency)
 MultiCurl::setConnectTimeout($seconds)
 MultiCurl::setCookie($key, $value)
 MultiCurl::setCookieFile($cookie_file)
diff --git a/src/Curl/MultiCurl.php b/src/Curl/MultiCurl.php
index ce8c1c5..c7896d1 100644
--- a/src/Curl/MultiCurl.php
+++ b/src/Curl/MultiCurl.php
@@ -360,6 +360,17 @@ class MultiCurl
         $this->setOpt(CURLOPT_USERPWD, $username . ':' . $password);
     }
 
+    /**
+     * Set Concurrency
+     *
+     * @access public
+     * @param  $concurrency
+     */
+    public function setConcurrency($concurrency)
+    {
+        $this->concurrency = $concurrency;
+    }
+
     /**
      * Set Digest Authentication
      *