diff --git a/conf/carddav.config.inc.php b/conf/carddav.config.inc.php
index 75bd9a4..13c4509 100644
--- a/conf/carddav.config.inc.php
+++ b/conf/carddav.config.inc.php
@@ -1,41 +1,59 @@
 <?php
 
-//// RCMCardDAV Plugin Admin Settings
+// RCMCardDAV Plugin Admin Settings
 
-//// ** ADDRESSBOOK PRESETS
+// ** ADDRESSBOOK PRESETS
 
-//// PRESET FOR: baikal
-//$prefs['Baïkal'] = array(
-//        // required attributes
-//        'name'         =>  'Baïkal',
-//        'username'     =>  '%u',
-//        'password'     =>  '%p',
-//        'url'          =>  '{baikal_url}/card.php/addressbooks/%u/',
-//
-//        // optional attributes
-//        'active'       =>  true,
-//        'readonly'     =>  false,
-//        'refresh_time' => '00:05:00',
-//
-//        'fixed'        =>  array('username', 'password'),
-//        'hide'         =>  false,
-//);
-//// END: baikal
+/* PRESET FOR: baikal
+$prefs['Baïkal'] = array(
+        // required attributes
+        'name'         =>  'Baïkal',
+        'username'     =>  '%u',
+        'password'     =>  '%p',
+        'url'          =>  '{baikal_url}/card.php/addressbooks/%u/',
 
-//// PRESET FOR: owncloud
-//$prefs['ownCloud'] = array(
-//        // required attributes
-//        'name'         =>  'ownCloud',
-//        'username'     =>  '%u',
-//        'password'     =>  '%p',
-//        'url'          =>  '{owncloud_url}/remote.php/dav/addressbooks/users/%u/default/',
-//
-//        // optional attributes
-//        'active'       =>  true,
-//        'readonly'     =>  false,
-//        'refresh_time' => '00:05:00',
-//
-//        'fixed'        =>  array('username', 'password'),
-//        'hide'         =>  false,
-//);
-//// END: owncloud
+        // optional attributes
+        'active'       =>  true,
+        'readonly'     =>  false,
+        'refresh_time' => '00:05:00',
+
+        'fixed'        =>  array('username', 'password'),
+        'hide'         =>  false,
+);
+END: baikal */
+
+/* PRESET FOR: owncloud
+$prefs['ownCloud'] = array(
+        // required attributes
+        'name'         =>  'ownCloud',
+        'username'     =>  '%u',
+        'password'     =>  '%p',
+        'url'          =>  '{owncloud_url}/remote.php/dav/addressbooks/users/%u/default/',
+
+        // optional attributes
+        'active'       =>  true,
+        'readonly'     =>  false,
+        'refresh_time' => '00:05:00',
+
+        'fixed'        =>  array('username', 'password'),
+        'hide'         =>  false,
+);
+END: owncloud */
+
+/* PRESET FOR: nextcloud
+$prefs['NextCloud'] = array(
+        // required attributes
+        'name'         =>  'nextCloud',
+        'username'     =>  '%u',
+        'password'     =>  '%p',
+        'url'          =>  '{nextcloud_url}/remote.php/dav/addressbooks/users/%u/contacts/',
+
+        // optional attributes
+        'active'       =>  true,
+        'readonly'     =>  false,
+        'refresh_time' => '00:05:00',
+
+        'fixed'        =>  array('username', 'password'),
+        'hide'         =>  false,
+);
+END: nextcloud */
diff --git a/scripts/install b/scripts/install
index 87df807..8cf810d 100644
--- a/scripts/install
+++ b/scripts/install
@@ -176,7 +176,8 @@ then
             carddav_path=$(ynh_app_setting_get $carddav_app_id path)
             carddav_url="https://${carddav_domain}${carddav_path%/}"
             ynh_replace_string "{${carddav_app}_url}" "$carddav_url" "$carddav_tmp_config"
-            sed -i "/\/\/\/\/ PRESET FOR: $carddav_app/,/\/\/\/\/ END: $carddav_app/s/^\/\///" "$carddav_tmp_config"
+            ynh_replace_string "/* PRESET FOR: $carddav_app" "" "$carddav_tmp_config"
+            ynh_replace_string "END: $carddav_app */" "" "$carddav_tmp_config"
         fi
     done
 
diff --git a/scripts/upgrade b/scripts/upgrade
index 61b6dca..d1eb374 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -202,7 +202,8 @@ then
             carddav_path=$(ynh_app_setting_get $carddav_app_id path)
             carddav_url="https://${carddav_domain}${carddav_path%/}"
             ynh_replace_string "{${carddav_app}_url}" "$carddav_url" "$carddav_tmp_config"
-            sed -i "/\/\/\/\/ PRESET FOR: $carddav_app/,/\/\/\/\/ END: $carddav_app/s/^\/\///" "$carddav_tmp_config"
+            ynh_replace_string "\/\* PRESET FOR: $carddav_app" "" "$carddav_tmp_config"
+            ynh_replace_string "END: $carddav_app \*\/" "" "$carddav_tmp_config"
         fi
     done