diff --git a/src/think/cache/driver/File.php b/src/think/cache/driver/File.php
index b36b069654..70a4757d79 100644
--- a/src/think/cache/driver/File.php
+++ b/src/think/cache/driver/File.php
@@ -176,7 +176,8 @@ public function set($name, $value, $expire = null): bool
         }
 
         $data   = "<?php\n//" . sprintf('%012d', $expire) . "\n exit();?>\n" . $data;
-        $result = file_put_contents($filename, $data);
+
+        $result = file_put_contents($filename, $data, LOCK_EX);
 
         if ($result) {
             clearstatcache();