diff --git a/payment/uc_authorizenet/uc_authorizenet.module b/payment/uc_authorizenet/uc_authorizenet.module
index 5dc3615..e4a5758 100644
--- a/payment/uc_authorizenet/uc_authorizenet.module
+++ b/payment/uc_authorizenet/uc_authorizenet.module
@@ -531,7 +531,7 @@ function _uc_authorizenet_charge($order, $amount, $data) {
   curl_setopt($ch, CURLOPT_POST, 1);
   curl_setopt($ch, CURLOPT_POSTFIELDS, implode('&', $post_fields));
   curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
-  curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
+  curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 1);
   curl_setopt($ch, CURLOPT_NOPROGRESS, 1);
   curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 0);
   $result = curl_exec($ch);
@@ -696,7 +696,7 @@ function uc_authorizenet_xml_api($server, $xml) {
   curl_setopt($ch, CURLOPT_HEADER, 1);
   curl_setopt($ch, CURLOPT_POSTFIELDS, $xml);
   curl_setopt($ch, CURLOPT_POST, 1);
-  curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
+  curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 1);
   $response = curl_exec($ch);
 
   // Log any errors to the watchdog.
diff --git a/payment/uc_cybersource/uc_cybersource.module b/payment/uc_cybersource/uc_cybersource.module
index a9ec847..f11d9e1 100644
--- a/payment/uc_cybersource/uc_cybersource.module
+++ b/payment/uc_cybersource/uc_cybersource.module
@@ -661,7 +661,7 @@ function _uc_cybersource_post_charge($order, $amount, $data, $cc_type, $country)
   curl_setopt($ch, CURLOPT_POST, 1);
   curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
   curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
-  curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
+  curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 1);
   curl_setopt($ch, CURLOPT_NOPROGRESS, 1);
   curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 0);
   $response = curl_exec($ch);
diff --git a/payment/uc_paypal/uc_paypal.module b/payment/uc_paypal/uc_paypal.module
index 3257cfb..813d8b6 100644
--- a/payment/uc_paypal/uc_paypal.module
+++ b/payment/uc_paypal/uc_paypal.module
@@ -978,6 +978,12 @@ function uc_paypal_api_request($request, $server) {
     $data .= $key . '=' . urlencode(str_replace(',', '', $value)) . '&';
   }
   $data = substr($data, 0, -1);
+  
+  if(preg_match('/^https:\/\/www.sandbox.paypal.com\//', $server)) {
+    $verify_peer = 1;
+  } else {
+    $verify_peer = 0;
+  }
 
   $ch = curl_init();
   curl_setopt($ch, CURLOPT_URL, $server);
@@ -985,7 +991,7 @@ function uc_paypal_api_request($request, $server) {
   curl_setopt($ch, CURLOPT_POST, 1);
   curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
   curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
-  curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
+  curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, $verify_peer);
   curl_setopt($ch, CURLOPT_NOPROGRESS, 1);
   curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 0);
   $response = curl_exec($ch);