diff --git a/src/Illuminate/Contracts/Cache/Lock.php b/src/Illuminate/Contracts/Cache/Lock.php
index <HASH>..<HASH> 100644
--- a/src/Illuminate/Contracts/Cache/Lock.php
+++ b/src/Illuminate/Contracts/Cache/Lock.php
@@ -24,7 +24,7 @@ interface Lock
     /**
      * Release the lock.
      *
-     * @return void
+     * @return bool
      */
     public function release();
fix return type of Lock::release in PHPDoc (#<I>)