diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 00000000..176b7816
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,5 @@
+# CHANGELOG
+
+## 2.0.0-alpha1 - 2018-05-09
+
+* First alpha release.
diff --git a/src/Client.php b/src/Client.php
index 3e654327..adc8d669 100644
--- a/src/Client.php
+++ b/src/Client.php
@@ -57,7 +57,7 @@ class Client implements ClientInterface
 
     public const CONFIG_ERROR_FORMATTER = 'error_formatter';
 
-    protected const CLIENT_VERSION = '2.0.x-dev';
+    protected const VERSION = '2.0.0-alpha1';
 
     private const DEFAULT_ENDPOINT = 'https://api.enterprise.apigee.com/v1';
 
@@ -174,7 +174,7 @@ public function getUserAgent(): string
      */
     public function getClientVersion(): string
     {
-        return sprintf('Apigee Edge PHP SDK %s', self::CLIENT_VERSION);
+        return sprintf('Apigee Edge PHP Client %s', self::VERSION);
     }
 
     /**