diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7aeeb92f9..50939340f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,12 @@ All notable changes to this project will be documented in this file.
 
 This project adheres to [Semantic Versioning](http://semver.org/).
 
+## [5.2.0] - 2017-02-23 ##
+### Added
+- Pull #346
+- Allow passing curlOptions to the client
+- Thanks to [Taluu](https://github.com/sendgrid/sendgrid-php/pull/346) for the PR!
+
 ## [5.1.2] - 2016-10-11 ##
 ### Added
 - Pull #330, Fixes #320
diff --git a/README.md b/README.md
index 1f00317f7..c1b07efea 100644
--- a/README.md
+++ b/README.md
@@ -49,7 +49,7 @@ Add SendGrid to your `composer.json` file. If you are not using [Composer](http:
 ```json
 {
   "require": {
-    "sendgrid/sendgrid": "~5.1"
+    "sendgrid/sendgrid": "~5.2"
   }
 }
 ```
diff --git a/composer.json b/composer.json
index 73e581240..1bef46e00 100644
--- a/composer.json
+++ b/composer.json
@@ -1,7 +1,7 @@
 {
   "name": "sendgrid/sendgrid",
   "description": "This library allows you to quickly and easily send emails through SendGrid using PHP.",
-  "version": "5.1.2",
+  "version": "5.2.0",
   "homepage": "http://github.com/sendgrid/sendgrid-php",
   "license": "MIT",
   "keywords": ["SendGrid", "sendgrid", "email", "send", "grid"],
diff --git a/lib/SendGrid.php b/lib/SendGrid.php
index 862a82e69..4c79d57b7 100644
--- a/lib/SendGrid.php
+++ b/lib/SendGrid.php
@@ -16,7 +16,7 @@
   */
 class SendGrid
 {
-    const VERSION = '5.1.2';
+    const VERSION = '5.2.0';
 
     /**
      *
diff --git a/test/unit/SendGridTest.php b/test/unit/SendGridTest.php
index 2cf0c2123..d2775a887 100644
--- a/test/unit/SendGridTest.php
+++ b/test/unit/SendGridTest.php
@@ -59,7 +59,7 @@ public static function setUpBeforeClass()
 
     public function testVersion()
     {
-        $this->assertEquals(SendGrid::VERSION, '5.1.2');
+        $this->assertEquals(SendGrid::VERSION, '5.2.0');
         $this->assertEquals(json_decode(file_get_contents(__DIR__ . '/../../composer.json'))->version, SendGrid::VERSION);
     }