diff --git a/src/Rules/MediaRule.php b/src/Rules/MediaRule.php
index 2459aa6..86a5c46 100644
--- a/src/Rules/MediaRule.php
+++ b/src/Rules/MediaRule.php
@@ -39,10 +39,6 @@ public function __construct(...$types)
      */
     public function passes($attribute, $value)
     {
-        if (is_string($value) && base64_decode(base64_encode($value)) === $value) {
-            return true;
-        }
-
         if (! $value instanceof UploadedFile) {
             return false;
         }
@@ -84,6 +80,10 @@ protected function getTypeString($value): string
             )));
         }
 
+        if (is_string($value) && base64_decode(base64_encode($value)) === $value) {
+            $type = 'image';
+        }
+
         return $type; // either: image, video or audio.
     }