diff --git a/composer.json b/composer.json
index 4347da9..0fa85a9 100644
--- a/composer.json
+++ b/composer.json
@@ -27,6 +27,10 @@
   "require-dev": {
     "algo26-matthias/idna-convert": "^3.0"
   },
+  "suggest":  {
+    "ext-mbstring": "Install ext/mbstring for using input / output other than UTF-8 or ISO-8859-1",
+    "ext-iconv": "Install ext/iconv for using input / output other than UTF-8 or ISO-8859-1"
+  },
   "autoload-dev": {
     "psr-4": {
       "StevieRay\\": "src"
diff --git a/src/Generator.php b/src/Generator.php
index 860e841..540d017 100644
--- a/src/Generator.php
+++ b/src/Generator.php
@@ -3,6 +3,7 @@
 namespace StevieRay;
 
 use Algo26\IdnaConvert\ToIdn;
+use Algo26\IdnaConvert\EncodingHelper\ToUtf8;
 
 class Generator
 {
@@ -44,15 +45,21 @@ public function domainWorker()
             throw new \RuntimeException('Error opening file ' . $domainsFile);
         }
         $lines = array();
+        $IDN = new ToIdn();
+        $encodingHelper = new ToUtf8();
+
         while (($line = fgets($handle)) !== false) {
             $line = trim(preg_replace('/\s\s+/', ' ', $line));
 
             // convert internationalized domain names
-            if (preg_match('/[А-Яа-яЁёɢ]/u', $line)) {
+            if (preg_match('/[А-Яа-яЁёöɢ]/u', $line)) {
+
 
                 $IDN = new ToIdn();
 
-                $line = $IDN->encode($line);
+                $line = $encodingHelper->convert($line);
+
+                $line = $IDN->convert($line);
 
             }