diff --git a/version.go b/version.go
index 853cce34..3698da33 100644
--- a/version.go
+++ b/version.go
@@ -1,4 +1,4 @@
 package graylog
 
 // Version is the go-graylog's version.
-const Version = "3.3.0"
+const Version = "4.0.0"