diff --git a/apps/contacts/ajax/deletecard.php b/apps/contacts/ajax/deletecard.php
index 6414fda93c..e6d0405a24 100644
--- a/apps/contacts/ajax/deletecard.php
+++ b/apps/contacts/ajax/deletecard.php
@@ -29,7 +29,7 @@ function bailOut($msg) {
 OCP\JSON::checkLoggedIn();
 OCP\JSON::checkAppEnabled('contacts');
 
-$id = isset($_GET['id'])?$_GET['id']:null;
+$id = isset($_POST['id'])?$_POST['id']:null;
 if(!$id) {
 	bailOut(OC_Contacts_App::$l10n->t('id is not set.'));
 }
diff --git a/apps/contacts/ajax/deleteproperty.php b/apps/contacts/ajax/deleteproperty.php
index b0746d18a7..e6c2bd9f80 100644
--- a/apps/contacts/ajax/deleteproperty.php
+++ b/apps/contacts/ajax/deleteproperty.php
@@ -24,8 +24,8 @@
 OCP\JSON::checkLoggedIn();
 OCP\JSON::checkAppEnabled('contacts');
 
-$id = $_GET['id'];
-$checksum = $_GET['checksum'];
+$id = $_POST['id'];
+$checksum = $_POST['checksum'];
 
 $vcard = OC_Contacts_App::getContactVCard( $id );
 $line = OC_Contacts_App::getPropertyLineByChecksum($vcard, $checksum);
diff --git a/apps/contacts/js/contacts.js b/apps/contacts/js/contacts.js
index 35d4a4a216..a241856300 100644
--- a/apps/contacts/js/contacts.js
+++ b/apps/contacts/js/contacts.js
@@ -368,7 +368,7 @@ Contacts={
 				$('#contacts_deletecard').tipsy('hide');
 				OC.dialogs.confirm(t('contacts', 'Are you sure you want to delete this contact?'), t('contacts', 'Warning'), function(answer) {
 					if(answer == true) {
-						$.getJSON(OC.filePath('contacts', 'ajax', 'deletecard.php'),{'id':Contacts.UI.Card.id},function(jsondata){
+						$.post(OC.filePath('contacts', 'ajax', 'deletecard.php'),{'id':Contacts.UI.Card.id},function(jsondata){
 							if(jsondata.status == 'success'){
 								var newid = '';
 								var curlistitem = $('#leftcontent [data-id="'+jsondata.data.id+'"]');
@@ -707,7 +707,7 @@ Contacts={
 				Contacts.UI.loading(obj, true);
 				var checksum = Contacts.UI.checksumFor(obj);
 				if(checksum) {
-					$.getJSON(OC.filePath('contacts', 'ajax', 'deleteproperty.php'),{'id': this.id, 'checksum': checksum },function(jsondata){
+					$.post(OC.filePath('contacts', 'ajax', 'deleteproperty.php'),{'id': this.id, 'checksum': checksum },function(jsondata){
 						if(jsondata.status == 'success'){
 							if(type == 'list') {
 								Contacts.UI.propertyContainerFor(obj).remove();