diff --git a/CHANGELOG.md b/CHANGELOG.md
index 78ffbfa..d6480b8 100755
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+<a name="4.0.0"></a>
+# [4.0.0](https://github.com/glowyphp/macroable) (2021-07-02)
+* Moving to PHP 8.1
+
 <a name="3.1.0"></a>
 # [3.1.0](https://github.com/glowyphp/macroable) (2021-12-26)
 * Added `flushMacros` method.
diff --git a/composer.json b/composer.json
index 2c5542c..f8e2659 100644
--- a/composer.json
+++ b/composer.json
@@ -25,7 +25,6 @@
         }
     },
     "config": {
-        "lock": false,
         "apcu-autoloader": true,
         "optimize-autoloader": true,
         "platform-check": false,