Throw error 404 when trying to open invalid page in threads list

boards/views/all_threads.py

@@ -1,6 +1,8 b''
 from django.core.files import File
 from django.core.files.temp import NamedTemporaryFile
+from django.core.paginator import EmptyPage
 from django.db import transaction
+from django.http import Http404
 from django.shortcuts import render, redirect
 import requests
 
@@ -46,7 +48,10 b' class AllThreadsView(PostMixin, BaseBoar'
                                   settings.THREADS_PER_PAGE)
         paginator.current_page = int(page)
 
-        threads = paginator.page(page).object_list
+        try:
+            threads = paginator.page(page).object_list
+        except EmptyPage:
+            raise Http404()
 
         params[PARAMETER_THREADS] = threads
         params[CONTEXT_FORM] = form