diff --git a/cleantalk.antispam/lang/en/options.php b/cleantalk.antispam/lang/en/options.php
index 59e112b..cb7ceb1 100644
--- a/cleantalk.antispam/lang/en/options.php
+++ b/cleantalk.antispam/lang/en/options.php
@@ -58,4 +58,6 @@
 $MESS['CLEANTALK_RESET_OPTIONS_FAILED'] = 'Can not reset options to defaults.';
 $MESS['CLEANTALK_MULTISITE_LABEL_KEY'] = 'If you want to use specific Access Key for this website paste it here. Otherwise, leave it empty.';
 $MESS['CLEANTALK_USE_CUSTOM_SERVER'] = 'Use custom server';
-$MESS['CLEANTALK_USE_CUSTOM_SERVER_DESCRIPTION'] = 'Use custom server for spam checking. You can enter cleantalk.ru and the plugin will use only ru servers. This option is for critical situations when it is impossible to choose the server automatically.';
\ No newline at end of file
+$MESS['CLEANTALK_USE_CUSTOM_SERVER_DESCRIPTION'] = 'Use custom server for spam checking. You can enter cleantalk.ru and the plugin will use only ru servers. This option is for critical situations when it is impossible to choose the server automatically.';
+$MESS['CLEANTALK_CURL_NOT_AVAILABLE'] = 'cURL is not available.';
+$MESS['CLEANTALK_CURL_NOT_AVAILABLE_DETAILS'] = 'cURL support is required';
diff --git a/cleantalk.antispam/lang/ru/options.php b/cleantalk.antispam/lang/ru/options.php
index aeb774f..52c3892 100644
--- a/cleantalk.antispam/lang/ru/options.php
+++ b/cleantalk.antispam/lang/ru/options.php
@@ -59,4 +59,6 @@
 $MESS['CLEANTALK_MULTISITE_LABEL_KEY'] = 'Если вы хотите использовать отдельный ключ доступа для этого сайта, вставьте его здесь. В противном случае оставьте поле пустым.';
 $MESS['CLEANTALK_USE_CUSTOM_SERVER'] = 'Использовать кастомный сервер';
 $MESS['CLEANTALK_USE_CUSTOM_SERVER_DESCRIPTION'] = 'Использовать кастомный сервер для проверки спама. Можете ввести cleantalk.ru и плагин будет использовать только ru сервера. Опция для критических ситуаций, когда невозможен выбор сервера автоматически.';
-$MESS['CLEANTALK_SERVER_NOT_AVAILABLE'] = 'Указанные сервера не доступны, обратитесь в тех поддержку https://cleantalk.org/my/support/open';
\ No newline at end of file
+$MESS['CLEANTALK_SERVER_NOT_AVAILABLE'] = 'Указанные сервера не доступны, обратитесь в тех поддержку https://cleantalk.org/my/support/open';
+$MESS['CLEANTALK_CURL_NOT_AVAILABLE'] = 'cURL не установлен.';
+$MESS['CLEANTALK_CURL_NOT_AVAILABLE_DETAILS'] = 'cURL необходим для работы модуля';
diff --git a/cleantalk.antispam/options.php b/cleantalk.antispam/options.php
index f1a0c0d..ddc3dfa 100644
--- a/cleantalk.antispam/options.php
+++ b/cleantalk.antispam/options.php
@@ -334,6 +334,19 @@ function ct_get_options($sModuleId){
     return $result;
 }
 
+// Check CURL available
+$curl_available = !function_exists('curl_init');
+if ( ! $curl_available ) {
+    $messageData = [
+            "MESSAGE" => GetMessage('CLEANTALK_CURL_NOT_AVAILABLE'),
+            "TYPE" => "ERROR",
+            "DETAILS" => GetMessage('CLEANTALK_CURL_NOT_AVAILABLE_DETAILS'),
+            "HTML" => false
+    ];
+    $adminMessage = new \CAdminMessage($messageData);
+    echo $adminMessage->Show();
+}
+
 /**
  * Describe tabs
  */