diff --git a/README.md b/README.md
index e6f03bc..6c460d8 100644
--- a/README.md
+++ b/README.md
@@ -26,6 +26,7 @@ php-dom
 php-pdo
 php-curl
 php-gd
+php-mbstring
 php-mysql
 sphinxsearch
 ```
diff --git a/config/app.php.txt b/config/app.php.txt
index 4f637d8..c5af62a 100644
--- a/config/app.php.txt
+++ b/config/app.php.txt
@@ -118,6 +118,12 @@ define('CRAWL_LOG_SECONDS_OFFSET', 60*60*24*30);
  */
 define('CRAWL_CURLOPT_USERAGENT', 'YGGo Search Crawler / Bot ( https://github.com/YGGverse/YGGo )');
 
+/*
+ * Skip curl download on response data size reached
+ *
+ */
+define('CRAWL_CURLOPT_PROGRESSFUNCTION_DOWNLOAD_SIZE_LIMIT', 10485760);
+
 /*
  * Stop crawler on disk quota reached (Mb)
  *
diff --git a/crontab/cleaner.php b/crontab/cleaner.php
index 46f1789..8e30731 100644
--- a/crontab/cleaner.php
+++ b/crontab/cleaner.php
@@ -149,7 +149,7 @@ try {
 
     $delete = false;
 
-    $curl = new Curl($manifest->url);
+    $curl = new Curl($manifest->url, CRAWL_CURLOPT_USERAGENT);
 
     // Update curl stats
     $httpRequestsTotal++;
diff --git a/crontab/crawler.php b/crontab/crawler.php
index ee46562..7970c56 100644
--- a/crontab/crawler.php
+++ b/crontab/crawler.php
@@ -54,7 +54,7 @@ try {
   // Process manifests crawl queue
   foreach ($db->getManifestCrawlQueue(CRAWL_MANIFEST_LIMIT, time() - CRAWL_MANIFEST_SECONDS_OFFSET) as $queueManifest) {
 
-    $curl = new Curl($queueManifest->url);
+    $curl = new Curl($queueManifest->url, CRAWL_CURLOPT_USERAGENT);
 
     // Update curl stats
     $httpRequestsTotal++;
@@ -117,7 +117,7 @@ try {
     }
 
     // Begin hosts collection
-    $curl = new Curl($remoteManifest->result->api->hosts);
+    $curl = new Curl($remoteManifest->result->api->hosts, CRAWL_CURLOPT_USERAGENT);
 
     // Update curl stats
     $httpRequestsTotal++;
diff --git a/library/curl.php b/library/curl.php
index 6f3f674..5c8445a 100644
--- a/library/curl.php
+++ b/library/curl.php
@@ -11,6 +11,12 @@ class Curl {
 
     curl_setopt($this->_connection, CURLOPT_RETURNTRANSFER, true);
     curl_setopt($this->_connection, CURLOPT_CONNECTTIMEOUT, $connectTimeout);
+    curl_setopt($this->_connection, CURLOPT_NOPROGRESS, false);
+    curl_setopt($this->_connection, CURLOPT_PROGRESSFUNCTION, function(
+      $downloadSize, $downloaded, $uploadSize, $uploaded
+    ){
+        return ($downloaded > CRAWL_CURLOPT_PROGRESSFUNCTION_DOWNLOAD_SIZE_LIMIT) ? 1 : 0;
+    });
 
     if ($userAgent) {
       curl_setopt($this->_connection, CURLOPT_USERAGENT, (string) $userAgent);