diff --git a/bookshelf/composer.json b/bookshelf/composer.json
index 7dd0d4f8..734164f4 100644
--- a/bookshelf/composer.json
+++ b/bookshelf/composer.json
@@ -1,6 +1,6 @@
 {
   "require": {
-    "php": "^7.1.3",
+    "php": "^8.0.0",
     "laravel/lumen-framework": "5.8.*",
     "google/cloud-storage": "^1.11",
     "google/cloud-firestore": "^1.2",