diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8a569c87..a28b8313 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,10 @@
+2.5.1 / 2021-11-24
+==================
+
+  * Fix PHP 8.1 deprecation warnings
+  * Fix return type of `toUrl`
+  * Add syntax to code blocks in `README`
+
 2.5.0 / 2021-11-10
 ==================
 
diff --git a/composer.json b/composer.json
index d1c52d38..71b71538 100644
--- a/composer.json
+++ b/composer.json
@@ -1,6 +1,6 @@
 {
   "name": "cloudinary/cloudinary_php",
-  "version": "2.5.0",
+  "version": "2.5.1",
   "description": "Cloudinary PHP SDK",
   "keywords": [
     "cloudinary",
diff --git a/docs/sami_config.php b/docs/sami_config.php
index f4f110af..89bb1bd5 100644
--- a/docs/sami_config.php
+++ b/docs/sami_config.php
@@ -14,7 +14,7 @@
         'theme'                => 'cloudinary',
         'template_dirs'        => [$docsDir . 'themes'],
         'title'                => 'Cloudinary PHP SDK',
-        'version'              => '2.5.0',
+        'version'              => '2.5.1',
         'build_dir'            => $docsDir . 'build',
         'cache_dir'            => $docsDir . 'cache',
         'default_opened_level' => 1,
diff --git a/src/Cloudinary.php b/src/Cloudinary.php
index c86d2e98..aa88bb5e 100644
--- a/src/Cloudinary.php
+++ b/src/Cloudinary.php
@@ -33,7 +33,7 @@ class Cloudinary
      *
      * @var string VERSION
      */
-    const VERSION = '2.5.0';
+    const VERSION = '2.5.1';
 
     /**
      * Defines the Cloudinary cloud details and other global configuration options.