Magento : Unknown cipher in list: TLSv1 [duplicate]

Go to downloader/lib/Mage/HTTP/Client/Curl.php,

            Edit Curl.php in notepad++ go line no. 377 or find

$this->curlOption(CURLOPT_SSL_CIPHER_LIST, 'TLSv1');

    to

$this->curlOption(CURLOPT_SSLVERSION, CURL_SSLVERSION_TLSv1);


Done! :)