diff --git a/.github/workflows/maven.yml b/.github/workflows/maven.yml
index 8d0f8c4..2e8af4b 100644
--- a/.github/workflows/maven.yml
+++ b/.github/workflows/maven.yml
@@ -12,7 +12,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, windows-latest, macos-latest]
-        java: [11, 17]
+        java: [21]
 
     steps:
     - uses: actions/checkout@v4.1.6
diff --git a/LICENSE b/LICENSE
index dcb2d9c..6ce3dd3 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2022 Tim Brust
+Copyright (c) 2024 Tim Brust
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
diff --git a/pom.xml b/pom.xml
index b0a528a..9399b99 100644
--- a/pom.xml
+++ b/pom.xml
@@ -4,12 +4,12 @@
   <parent>
     <groupId>de.dustplanet</groupId>
     <artifactId>bukkit-plugin</artifactId>
-    <version>7.1.0</version>
+    <version>9.0.0</version>
     <relativePath />
   </parent>
 
   <artifactId>PasswordProtect</artifactId>
-  <version>3.1.1-SNAPSHOT</version>
+  <version>4.0.0-SNAPSHOT</version>
   <name>PasswordProtect</name>
   <description>Protect your server with a password</description>
   <url>https://dev.bukkit.org/projects/passwordprotect</url>