diff --git a/VERSION b/VERSION
index 17831900..2468aa9e 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.2.0-RC1
+3.0.0-dev
diff --git a/src/Client.php b/src/Client.php
index cf1cfb96..1636cc6f 100644
--- a/src/Client.php
+++ b/src/Client.php
@@ -53,7 +53,7 @@ use Traversable;
  */
 class Client implements ClientInterface, IteratorAggregate
 {
-    public const VERSION = '2.2.0-RC1';
+    public const VERSION = '3.0.0-dev';
 
     /** @var OptionsInterface */
     private $options;