diff --git a/README.md b/README.md
index c5b785f..aa07a7f 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@ This repository is used to automatically build a [GIPS](https://github.com/Echtz
 ## Packages/Configuration
 
 - [Ubuntu 24.04](https://app.vagrantup.com/gusztavvargadr/boxes/xubuntu-desktop-2404-lts)
-- [OpenJDK 17](https://openjdk.org/projects/jdk/17/)
+- [OpenJDK 21](https://openjdk.org/projects/jdk/21/)
 - [Graphviz](https://graphviz.org/)
 - [GIPS Eclipse build](https://github.com/Echtzeitsysteme/gips-eclipse-build) (variant: *eclipse-gips-linux-user*)
 - [GLPK ILP solver](https://www.gnu.org/software/glpk/)
diff --git a/prov.sh b/prov.sh
index 2224e1f..4f2875c 100644
--- a/prov.sh
+++ b/prov.sh
@@ -29,9 +29,9 @@ log "Installing updates."
 sudo apt-get update
 sudo apt-get upgrade -y
 
-# Java/JDK17
+# Java/JDK21
 log "Installing OpenJDK."
-sudo apt-get install -y openjdk-17-jdk
+sudo apt-get install -y openjdk-21-jdk
 #java --version
 
 # Packages for building a new kernel