diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0453166..4edc056 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,15 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
 
+## Unreleased
+
+### Deprecated
+
+The following will be removed in ramsey/uuid 5.0.0:
+
+* `Ramsey\Uuid\Generator\RandomLibAdapter`
+
+
 ## 4.3.0 - 2022-03-26
 
 ### Changed
diff --git a/composer.json b/composer.json
index dc8e591..9c3fef0 100644
--- a/composer.json
+++ b/composer.json
@@ -74,9 +74,6 @@
         "sort-packages": true
     },
     "extra": {
-        "branch-alias": {
-            "dev-main": "4.x-dev"
-        },
         "captainhook": {
             "force-install": true
         }
diff --git a/composer.lock b/composer.lock
index be1a643..0cdb44b 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "6c17396508c539b8fa90349419d06309",
+    "content-hash": "ce3cd44d20ba1daf10d5ab2a9631b702",
     "packages": [
         {
             "name": "brick/math",
diff --git a/src/Generator/RandomLibAdapter.php b/src/Generator/RandomLibAdapter.php
index 24ed569..793ccd5 100644
--- a/src/Generator/RandomLibAdapter.php
+++ b/src/Generator/RandomLibAdapter.php
@@ -21,6 +21,10 @@ use RandomLib\Generator;
  * RandomLibAdapter generates strings of random binary data using the
  * paragonie/random-lib library
  *
+ * @deprecated This class will be removed in 5.0.0. Use the default
+ *     RandomBytesGenerator or implement your own generator that implements
+ *     RandomGeneratorInterface.
+ *
  * @link https://packagist.org/packages/paragonie/random-lib paragonie/random-lib
  */
 class RandomLibAdapter implements RandomGeneratorInterface