diff --git a/lib/snoopy/snoopy.class.php b/lib/snoopy/snoopy.class.php
index 437affd6e2..47d0b3daf3 100644
--- a/lib/snoopy/snoopy.class.php
+++ b/lib/snoopy/snoopy.class.php
@@ -1064,7 +1064,6 @@ class Snoopy
         else
         {
             $curl = curl_init();
-            curl_setopt($curl, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_0);
             curl_setopt($curl, CURLOPT_USERAGENT, 'Sae T OAuth2 v0.1');
             curl_setopt($curl, CURLOPT_CONNECTTIMEOUT, 30);
             curl_setopt($curl, CURLOPT_TIMEOUT, 30);
diff --git a/misc/prepareupdate.php b/misc/prepareupdate.php
index fab36bce3e..b5a96e091b 100644
--- a/misc/prepareupdate.php
+++ b/misc/prepareupdate.php
@@ -430,7 +430,6 @@ class prepareUpdate
         }
 
         $curl = curl_init();
-        curl_setopt($curl, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_0);
         curl_setopt($curl, CURLOPT_USERAGENT, 'Sae T OAuth2 v0.1');
         curl_setopt($curl, CURLOPT_CONNECTTIMEOUT, 30);
         curl_setopt($curl, CURLOPT_TIMEOUT, 6000);
diff --git a/module/common/model.php b/module/common/model.php
index 5717d0841e..0882dc2872 100644
--- a/module/common/model.php
+++ b/module/common/model.php
@@ -1838,7 +1838,6 @@ class commonModel extends model
         }
 
         $curl = curl_init();
-        curl_setopt($curl, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_0);
         curl_setopt($curl, CURLOPT_USERAGENT, 'ZenTao PMS ' . $app->config->version);
         curl_setopt($curl, CURLOPT_CONNECTTIMEOUT, $timeout);
         curl_setopt($curl, CURLOPT_TIMEOUT, $timeout);