diff --git a/library/think/App.php b/library/think/App.php
index 40a736cf35..8d4313e19a 100644
--- a/library/think/App.php
+++ b/library/think/App.php
@@ -20,7 +20,7 @@
  */
 class App extends Container
 {
-    const VERSION = '5.1.20';
+    const VERSION = '5.1.21';
 
     /**
      * 当前模块路径