diff --git a/resources/views/portal/ninja2020/components/pdf-viewer.blade.php b/resources/views/portal/ninja2020/components/pdf-viewer.blade.php
index 6812bfcbb0e5..ef1bcef4ec0d 100644
--- a/resources/views/portal/ninja2020/components/pdf-viewer.blade.php
+++ b/resources/views/portal/ninja2020/components/pdf-viewer.blade.php
@@ -3,7 +3,7 @@
 @endphp
 
 @push('head')
-    <meta name="pdf-url" content="{{ $url ?? $entity->pdf_file_path(null, 'url', true) }}">
+    <meta name="pdf-url" content="{{ $url ?? $entity->pdf_file_path(null, 'url', true) }}?cache_buster={{time()}}">
     <script src="{{ asset('js/vendor/pdf.js/pdf.min.js') }}"></script>
 @endpush
 
@@ -86,7 +86,7 @@
         <canvas id="pdf-placeholder" class="shadow rounded-lg bg-white"></canvas>
     </div>
 @else
-    <iframe id="pdf-iframe" src="{{ $url ?? $entity->pdf_file_path(null, 'url', true) }}" class="h-screen w-full border-0 mt-4"></iframe>
+    <iframe id="pdf-iframe" src="{{ $url ?? $entity->pdf_file_path(null, 'url', true) }}?cache_buster={{time()}}" class="h-screen w-full border-0 mt-4"></iframe>
 @endif