diff --git a/gulliver/system/class.g.php b/gulliver/system/class.g.php
index 154473d50..350eb1f7d 100644
--- a/gulliver/system/class.g.php
+++ b/gulliver/system/class.g.php
@@ -5495,16 +5495,31 @@ class G
                     }
                     break;
                 case 'docx':
+                    if ($docType[1] == 'vnd.openxmlformats-officedocument.wordprocessingml.document') {
+                        $res->status = true;
+                        return $res;
+                    }
+                    break;
                 case 'pptx':
+                    if ($docType[1] == 'vnd.openxmlformats-officedocument.presentationml.presentation') {
+                        $res->status = true;
+                        return $res;
+                    }
+                    break;
                 case 'xlsx':
-                    if ($docType[1] == 'zip') {
+                    if ($docType[1] == 'vnd.openxmlformats-officedocument.spreadsheetml.sheet') {
                         $res->status = true;
                         return $res;
                     }
                     break;
                 case 'exe':
+                    if ($docType[1] == 'x-msdownload' || $docType[1] == 'x-dosexec') {
+                        $res->status = true;
+                        return $res;
+                    }
+                    break;
                 case 'wmv':
-                    if($docType[1] == 'octet-stream'){
+                    if($docType[1] == 'x-ms-asf' || $docType[1] == 'x-ms-wmv'){
                         $res->status = true;
                         return $res;
                     }