diff --git a/README.md b/README.md
index 6097f5d..97d60c3 100644
--- a/README.md
+++ b/README.md
@@ -1,10 +1,17 @@
 PHP GUS API library
 ===================
-PHP GUS API library based on **official** REGON SOAP api.
-Official GUS docs [here](http://bip.stat.gov.pl/dzialalnosc-statystyki-publicznej/rejestr-regon/interfejsyapi/jak-skorzystac-informacja-dla-podmiotow-komercyjnych/)
+
+PHP GUS API is an object-oriented library to get information from [REGON site](https://wyszukiwarkaregon.stat.gov.pl/wsBIR/UslugaBIRzewnPubl.svc) based on **official** REGON SOAP API.
+Official GUS docs [here](http://bip.stat.gov.pl/dzialalnosc-statystyki-publicznej/rejestr-regon/interfejsyapi/jak-skorzystac-informacja-dla-podmiotow-komercyjnych/).
+
+Installation
+======================
+This library uses [Composer](https://packagist.org/packages/gusapi/gusapi), just type in:
+```composer require gusapi/gusapi```
 
 Example
 ======================
+See file [examples/getFromNip.php](examples/getFromNip.php).
 
 ```php
 require_once '../vendor/autoload.php';
@@ -16,11 +23,11 @@ use GusApi\ReportTypes;
 use GusApi\ReportTypeMapper;
 
 $gus = new GusApi(
-    'abcde12345abcde12345', // <--- your user key / twój klucz użytkownika
+    'abcde12345abcde12345', // your user key / twój klucz użytkownika
     new \GusApi\Adapter\Soap\SoapAdapter(
         RegonConstantsInterface::BASE_WSDL_URL,
-        RegonConstantsInterface::BASE_WSDL_ADDRESS //<--- production server / serwer produkcyjny
-        //for test serwer use RegonConstantsInterface::BASE_WSDL_ADDRESS_TEST
+        RegonConstantsInterface::BASE_WSDL_ADDRESS // production server / serwer produkcyjny
+        //for test server use RegonConstantsInterface::BASE_WSDL_ADDRESS_TEST
         //w przypadku serwera testowego użyj: RegonConstantsInterface::BASE_WSDL_ADDRESS_TEST
     )
 );
@@ -49,12 +56,10 @@ try {
     echo 'Bad user key';
 } catch (\GusApi\Exception\NotFoundException $e) {
     echo 'No data found <br>';
-    echo 'For more information read server message belowe: <br>';
+    echo 'For more information read server message below: <br>';
     echo $gus->getResultSearchMessage($sessionId);
 }
 
 ```
-or see file: getFromNip.php in examples directory.
 
-PHP GUS API is an object-oriented library to get information from [Regon site](https://wyszukiwarkaregon.stat.gov.pl/wsBIR/UslugaBIRzewnPubl.svc)
 
diff --git a/src/GusApi/GusApi.php b/src/GusApi/GusApi.php
index f142621..647244f 100644
--- a/src/GusApi/GusApi.php
+++ b/src/GusApi/GusApi.php
@@ -179,14 +179,14 @@ public function getByKrs($sid, $krs)
 
     /**
      * @param $sid
-     * @param array $nips
+     * @param array $nips Maxium quantity is 20.
      * @return SearchReport[]
      * @throws NotFoundException
      */
     public function getByNips($sid, array $nips)
     {
         if (count($nips) > 20) {
-            throw new \InvalidArgumentException("To few NIP numbers. Maximum quantity is 20");
+            throw new \InvalidArgumentException("Too many NIP numbers. Maximum quantity is 20.");
         }
         $nips = implode(',', $nips);
 
@@ -197,14 +197,14 @@ public function getByNips($sid, array $nips)
 
     /**
      * @param $sid
-     * @param array $krses
+     * @param array $krses Maxium quantity is 20.
      * @return SearchReport[]
      * @throws NotFoundException
      */
     public function getByKrses($sid, array $krses)
     {
         if (count($krses) > 20) {
-            throw new \InvalidArgumentException("To few KRS numbers. Maximum quantity is 20");
+            throw new \InvalidArgumentException("Too many KRS numbers. Maximum quantity is 20.");
         }
         $krses = implode(',', $krses);
 
@@ -215,14 +215,14 @@ public function getByKrses($sid, array $krses)
 
     /**
      * @param $sid
-     * @param array $regons
+     * @param array $regons Maxium quantity is 20.
      * @return SearchReport[]
      * @throws NotFoundException
      */
     public function getByRegons9($sid, array $regons)
     {
         if (count($regons) > 20) {
-            throw new \InvalidArgumentException("To few REGONS numbers. Maximum quantity is 20");
+            throw new \InvalidArgumentException("Too many REGON numbers. Maximum quantity is 20.");
         }
         $regons = implode(',', $regons);
 
@@ -233,14 +233,14 @@ public function getByRegons9($sid, array $regons)
 
     /**
      * @param $sid
-     * @param array $regons
+     * @param array $regons Maxium quantity is 20.
      * @return SearchReport[]
      * @throws NotFoundException
      */
     public function getByregons14($sid, array $regons)
     {
         if (count($regons) > 20) {
-            throw new \InvalidArgumentException("To few REGONS numbers. Maximum quantity is 20");
+            throw new \InvalidArgumentException("Too many REGON numbers. Maximum quantity is 20.");
         }
         $regons = implode(',', $regons);
 
@@ -326,4 +326,4 @@ private function search($sid, array $searchData)
 
         return $result;
     }
-}
\ No newline at end of file
+}
diff --git a/src/GusApi/SearchReport.php b/src/GusApi/SearchReport.php
index 94800f5..c1ad2b1 100644
--- a/src/GusApi/SearchReport.php
+++ b/src/GusApi/SearchReport.php
@@ -5,7 +5,7 @@
  * Class SearchReport
  * @package GusApi
  */
-class SearchReport
+class SearchReport implements \JsonSerializable
 {
     const TYPE_JURIDICAL_PERSON = 'p';
 
@@ -212,4 +212,14 @@ private function makeType($type)
     {
         return trim(strtolower($type));
     }
-}
\ No newline at end of file
+    
+    /**
+     * @return array
+     */
+    public function jsonSerialize()
+    {
+        $vars = get_object_vars($this);
+    
+        return $vars;
+    }
+}
diff --git a/tests/Client/RequestDecoderTest.php b/tests/Client/RequestDecoderTest.php
index 7ca68d4..b92693a 100644
--- a/tests/Client/RequestDecoderTest.php
+++ b/tests/Client/RequestDecoderTest.php
@@ -11,7 +11,7 @@ public function testDecodeRawRandomString()
 
     public function testDecodeValidSOAPResponse()
     {
-        $content = file_get_contents('../resources/validSOAPResponse.xsd');
+        $content = file_get_contents(__DIR__.'/../resources/validSOAPResponse.xsd');
 
         $result = RequestDecoder::decode($content);
         $this->assertEquals(trim($content), $result);
@@ -19,8 +19,8 @@ public function testDecodeValidSOAPResponse()
 
     public function testDecodeRawSOAPResponse()
     {
-        $content = file_get_contents('../resources/rawSOAPResponse.xsd');
-        $valid = file_get_contents('../resources/validSOAPResponse.xsd');
+        $content = file_get_contents(__DIR__.'/../resources/rawSOAPResponse.xsd');
+        $valid = file_get_contents(__DIR__.'/../resources/validSOAPResponse.xsd');
 
         $result = RequestDecoder::decode($content);
         $this->assertEquals(trim($valid), $result);