diff --git a/fetchupd.php b/fetchupd.php
index 3a48b96..927d852 100644
--- a/fetchupd.php
+++ b/fetchupd.php
@@ -164,7 +164,7 @@ function uupFetchUpd(
         'updateTitle' => $updateArray[0]['updateTitle'],
         'foundBuild' => $updateArray[0]['foundBuild'],
         'arch' => $updateArray[0]['arch'],
-        'fileWrite' => $updateArray[0]['foundBuild'],
+        'fileWrite' => $updateArray[0]['fileWrite'],
         'updateArray' => $updateArray,
     );
 }
diff --git a/get.php b/get.php
index f55feeb..e52ea8d 100644
--- a/get.php
+++ b/get.php
@@ -37,6 +37,14 @@ function uupGetFiles(
 ) {
     uupApiPrintBrand();
 
+    if(!$updateId) {
+        return array('error' => 'UNSPECIFIED_UPDATE');
+    }
+
+    if(!uupApiCheckUpdateId($updateId)) {
+            return array('error' => 'INCORRECT_ID');
+    }
+
     $info = @file_get_contents('fileinfo/'.$updateId.'.json');
     if(empty($info)) {
         $info = array(
diff --git a/listeditions.php b/listeditions.php
index 4f64dcd..7d780ef 100644
--- a/listeditions.php
+++ b/listeditions.php
@@ -24,6 +24,10 @@ function uupListEditions($lang = 'en-us', $updateId = 0) {
         $info = uupUpdateInfo($updateId);
     }
 
+    if(!$lang) {
+        return array('error' => 'UNSUPPORTED_LANG');
+    }
+
     if(isset($info['info'])) $info = $info['info'];
 
     if(isset($info['build'])) {
diff --git a/shared/main.php b/shared/main.php
index a76702e..81d958f 100644
--- a/shared/main.php
+++ b/shared/main.php
@@ -16,7 +16,7 @@ limitations under the License.
 */
 
 function uupApiVersion() {
-    return '1.26.2';
+    return '1.27.0';
 }
 
 require_once dirname(__FILE__).'/auths.php';
diff --git a/shared/utils.php b/shared/utils.php
index 5d59a64..026e3c5 100644
--- a/shared/utils.php
+++ b/shared/utils.php
@@ -113,3 +113,10 @@ function uupDumpApiGetDebug() {
     $data = parse_ini_file('debug.ini');
     return $data;
 }
+
+function uupApiCheckUpdateId($updateId) {
+    return preg_match(
+        '/^[\da-fA-F]{8}-([\da-fA-F]{4}-){3}[\da-fA-F]{12}(_rev\.\d+)?$/',
+        $updateId
+    );
+}