diff --git a/README.md b/README.md
index abe68a0..3a842d5 100644
--- a/README.md
+++ b/README.md
@@ -108,10 +108,10 @@ elasticsearch::instance { 'graylog':
 }
 
 class { 'graylog::repository':
-  version => '4.2'
+  version => '5.1'
 }->
 class { 'graylog::server':
-  package_version => '4.2.0-3',
+  package_version => '5.1.0-6',
   config          => {
     'password_secret' => '...',    # Fill in your password secret
     'root_password_sha2' => '...', # Fill in your root password hash
@@ -123,7 +123,7 @@ class { 'graylog::server':
 
 ```puppet
 class { '::graylog::repository':
-  version => '4.2'
+  version => '5.1'
 }->
 class { '::graylog::server':
   config  => {
@@ -183,7 +183,7 @@ version.
 
 It defaults to `$graylog::params::major_version`.
 
-Example: `version => '4.2'`
+Example: `version => '5.1'`
 
 ##### `url`
 
@@ -214,7 +214,7 @@ This setting is used to choose the Graylog package version. It defaults to
 install time. You can also use `latest` so it will always update to the latest
 stable version if a new one is available.
 
-Example: `package_version => '4.2.0-3'`
+Example: `package_version => '5.1.0-6'`
 
 ##### `config`
 
@@ -330,7 +330,7 @@ Example:
 
 ```
 graylog => {
-  major_version => '4.2',
+  major_version => '5.1',
   config        => {
     # ... see graylog::server description for details
   },
@@ -343,6 +343,7 @@ Supported Graylog versions:
 
 * 3.x
 * 4.x
+* 5.x
 
 Supported platforms:
 
diff --git a/manifests/params.pp b/manifests/params.pp
index 52526dd..f9ae82c 100644
--- a/manifests/params.pp
+++ b/manifests/params.pp
@@ -1,5 +1,5 @@
 class graylog::params {
-  $major_version = '4.2'
+  $major_version = '5.1'
   $package_version = 'installed'
 
   $repository_release = 'stable'
diff --git a/tests/vagrant.pp b/tests/vagrant.pp
index 307b23b..dd86b10 100644
--- a/tests/vagrant.pp
+++ b/tests/vagrant.pp
@@ -9,7 +9,7 @@
     version      => '7.10.2',
   },
   graylog       => {
-    major_version          => '4.2',
+    major_version          => '5.1',
     config                 => {
       'password_secret'          => '16BKgz0Qelg6eFeJYh8lc4hWU1jJJmAgHlPEx6qkBa2cQQTUG300FYlPOEvXsOV4smzRtnwjHAKykE3NIWXbpL7yGLN7V2P2',
       'root_password_sha2'       => '8c6976e5b5410415bde908bd4dee15dfb167a9c873fc4bb8a81f6f2ab448a918',