diff --git a/src/core/dnsupdater.cpp b/src/core/dnsupdater.cpp
index b7d1a0d9c..945cf4234 100644
--- a/src/core/dnsupdater.cpp
+++ b/src/core/dnsupdater.cpp
@@ -76,7 +76,7 @@ void DNSUpdater::checkPublicIP()
   m_lastIPCheckTime = QDateTime::currentDateTime();
   QNetworkRequest request;
   request.setUrl(QUrl("http://checkip.dyndns.org"));
-  request.setRawHeader("User-Agent", "qBittorrent/" VERSION" chris@qbittorrent.org");
+  request.setRawHeader("User-Agent", "qBittorrent/" VERSION);
   manager->get(request);
 }
 
@@ -123,7 +123,7 @@ void DNSUpdater::updateDNSService()
   m_lastIPCheckTime = QDateTime::currentDateTime();
   QNetworkRequest request;
   request.setUrl(getUpdateUrl());
-  request.setRawHeader("User-Agent", "qBittorrent/" VERSION" chris@qbittorrent.org");
+  request.setRawHeader("User-Agent", "qBittorrent/" VERSION);
   manager->get(request);
 }
 
diff --git a/src/core/downloadthread.cpp b/src/core/downloadthread.cpp
index e4dfd314b..0cca81849 100644
--- a/src/core/downloadthread.cpp
+++ b/src/core/downloadthread.cpp
@@ -191,9 +191,8 @@ QNetworkReply* DownloadThread::downloadUrl(const QString &url, const QList<QNetw
   qDebug("url is %s", qPrintable(url));
   const QUrl qurl = QUrl::fromEncoded(url.toUtf8());
   QNetworkRequest request(qurl);
-  // Spoof Firefox 3.5 user agent to avoid
-  // Web server banning
-  request.setRawHeader("User-Agent", "Mozilla/5.0 (X11; U; Linux i686 (x86_64); en-US; rv:1.9.1.5) Gecko/20091102 Firefox/3.5.5");
+  // Spoof Firefox 38 user agent to avoid web server banning
+  request.setRawHeader("User-Agent", "Mozilla/5.0 (X11; Linux i686; rv:38.0) Gecko/20100101 Firefox/38.0");
   qDebug("Downloading %s...", request.url().toEncoded().data());
   qDebug("%d cookies for this URL", m_networkManager.cookieJar()->cookiesForUrl(url).size());
   for (int i=0; i<m_networkManager.cookieJar()->cookiesForUrl(url).size(); ++i) {
diff --git a/src/searchengine/nova/helpers.py b/src/searchengine/nova/helpers.py
index e0443872a..02376db2e 100644
--- a/src/searchengine/nova/helpers.py
+++ b/src/searchengine/nova/helpers.py
@@ -36,7 +36,7 @@ import socks
 import re
 
 # Some sites blocks default python User-agent
-user_agent = 'Mozilla/5.0'
+user_agent = 'Mozilla/5.0 (X11; Linux i686; rv:38.0) Gecko/20100101 Firefox/38.0'
 headers    = {'User-Agent': user_agent}
 # SOCKS5 Proxy support
 if os.environ.has_key("sock_proxy") and len(os.environ["sock_proxy"].strip()) > 0:
diff --git a/src/searchengine/nova3/helpers.py b/src/searchengine/nova3/helpers.py
index 57a1b74fa..b5b0f0cf4 100644
--- a/src/searchengine/nova3/helpers.py
+++ b/src/searchengine/nova3/helpers.py
@@ -36,7 +36,7 @@ import socks
 import re
 
 # Some sites blocks default python User-agent
-user_agent = 'Mozilla/5.0'
+user_agent = 'Mozilla/5.0 (X11; Linux i686; rv:38.0) Gecko/20100101 Firefox/38.0'
 headers    = {'User-Agent': user_agent}
 # SOCKS5 Proxy support
 if "sock_proxy" in os.environ and len(os.environ["sock_proxy"].strip()) > 0: