diff --git a/system/src/Grav/Common/Page/Pages.php b/system/src/Grav/Common/Page/Pages.php
index c29b20104..dc8c375be 100644
--- a/system/src/Grav/Common/Page/Pages.php
+++ b/system/src/Grav/Common/Page/Pages.php
@@ -406,7 +406,7 @@ class Pages
                     $last_modified = Folder::lastModifiedFile(PAGES_DIR);
             }
 
-            $page_cache_id = md5(USER_DIR.$last_modified);
+            $page_cache_id = md5(USER_DIR.$last_modified.$config->checksum());
 
             list($this->instances, $this->routes, $this->children, $taxonomy_map, $this->sort) = $cache->fetch($page_cache_id);
             if (!$this->instances) {