diff --git a/PlagScan/API.php b/PlagScan/API.php
index b7518bff24da7b126d3902dc3c2a3b951c0e28d2..bb222cb4a67b0f642c291e85f43233d23b7531be 100644
--- a/PlagScan/API.php
+++ b/PlagScan/API.php
@@ -61,7 +61,7 @@ class API
             $url .= '?access_token=' . $accessToken;
         }
 
-        if ($requestType === 'GET') {
+        if ($requestType === 'GET' || $requestType === 'PATCH') {
             foreach ($data as $key => $value) {
                 $url .= '&' . $key . '=' . $value;
             }
diff --git a/PlagScan/Helper/Documents.php b/PlagScan/Helper/Documents.php
index df09dadb99f15dadc906770f581a48ece8fc865f..539f87a5c9ddd9882204d38ddaf2d8e8ec598c13 100644
--- a/PlagScan/Helper/Documents.php
+++ b/PlagScan/Helper/Documents.php
@@ -29,17 +29,21 @@ class Documents extends Base
     }
 
     /**
-     * @param string $data
+     * @param string $fileData
      * @param bool $plain
+     * @param int $userID
      * @return array|string
      */
-    public function add(string $fileData, bool $plain = false)
+    public function add(string $fileData, bool $plain, int $userID = 0)
     {
         if ($plain) {
             $data['textdata'] = $fileData;
         } else {
             $data['fileUpload'] = $fileData;
         }
+        if($userID){
+            $data['userID'] = $userID;
+        }
         return $this->handler->request('documents', 'POST', $this->accessToken, $data);
     }
 
diff --git a/PlagScan/Helper/Repository.php b/PlagScan/Helper/Repository.php
index fb5f4a1a56f4a91bc3d7cdf20f4d7113dc62f5c0..deb8a3c0c4cc15903b135dfd171b2f1c4f9d8a99 100644
--- a/PlagScan/Helper/Repository.php
+++ b/PlagScan/Helper/Repository.php
@@ -25,6 +25,6 @@ class Repository extends Base
      */
     public function delete(int $docID)
     {
-        return $this->handler->request('submissions/documents/' . $docID, 'DELETE', $this->accessToken);
+        return $this->handler->request('repositories/documents/' . $docID, 'DELETE', $this->accessToken);
     }
 }
\ No newline at end of file
diff --git a/PlagScan/Helper/Submissions.php b/PlagScan/Helper/Submissions.php
index 5a8a7499a53f317be7d94d63dd37230b8f6e0ffe..8687c57cd5f64d77f4987b9a317f84d31d245449 100644
--- a/PlagScan/Helper/Submissions.php
+++ b/PlagScan/Helper/Submissions.php
@@ -70,7 +70,7 @@ class Submissions extends Base
      */
     public function change(int $submissionID, array $changes)
     {
-        return $this->handler->request('submission/' . $submissionID, 'PATCH', $this->accessToken, $changes);
+        return $this->handler->request('submissions/' . $submissionID, 'PATCH', $this->accessToken, $changes);
     }
 
     /**