diff --git a/res/forum/api/upload_picture.php b/res/forum/api/upload_picture.php
index 1392121..802dd7d 100644
--- a/res/forum/api/upload_picture.php
+++ b/res/forum/api/upload_picture.php
@@ -30,6 +30,12 @@ if (!isset($_POST["name"]))
     goto send;
 }
 
+if (strlen($_POST["name"]) < 4)
+{
+    $status = 5;
+    goto send;
+}
+
 $file_format = strtolower(pathinfo($_FILES["file_upload"]["name"], PATHINFO_EXTENSION));
 
 if (!in_array($file_format, $supported_formats))
diff --git a/res/forum/home/home.html b/res/forum/home/home.html
index fe219f1..df18906 100644
--- a/res/forum/home/home.html
+++ b/res/forum/home/home.html
@@ -89,6 +89,10 @@
                     case 4:
                         alert("Příliš velký obrázek!\nMaximální velikost je 5MB!");
                         break;
+
+                    case 5:
+                        alert("Název musí být dlouhý alespoň 4 znaky!");
+                        break;
                 }
             }
         });