diff --git a/Jenkinsfile b/Jenkinsfile
index e34aa363..43d54e42 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -2,7 +2,7 @@ pipeline {
     agent any
 
     environment {
-        JDK_TOOL_NAME = 'JDK 11'
+        JDK_TOOL_NAME = 'JDK 21'
         MAVEN_TOOL_NAME = 'Maven 3.9.9'
     }
 
diff --git a/README.md b/README.md
index f2b78555..eafb3cf9 100644
--- a/README.md
+++ b/README.md
@@ -14,7 +14,7 @@ Maven by running:
 $ sudo apt-get install maven
 ```
 
-ModifiableVariable currently needs Java JDK 11 to run. If you have the correct Java version you can install
+ModifiableVariable currently needs Java JDK 21 to run. If you have the correct Java version you can install
 ModifiableVariable as follows.
 
 ```bash
@@ -30,7 +30,7 @@ If you want to use this project as a dependency, you do not have to compile it y
 <dependency>
     <groupId>de.rub.nds</groupId>
     <artifactId>modifiable-variable</artifactId>
-    <version>4.0.0</version>
+    <version>5.0.0</version>
 </dependency>
 ```
 
diff --git a/pom.xml b/pom.xml
index ce278694..7126facb 100644
--- a/pom.xml
+++ b/pom.xml
@@ -58,8 +58,8 @@
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
-        <maven.compiler.source>11</maven.compiler.source>
-        <maven.compiler.target>11</maven.compiler.target>
+        <maven.compiler.source>21</maven.compiler.source>
+        <maven.compiler.target>21</maven.compiler.target>
         <!-- The following variables are required for Jenkins CI -->
         <skipTests>false</skipTests>
         <skip.surefire.tests>${skipTests}</skip.surefire.tests>
@@ -116,7 +116,7 @@
                             <spacesPerTab>4</spacesPerTab>
                         </indent>
                         <googleJavaFormat>
-                            <version>1.16.0</version>
+                            <version>1.25.2</version>
                             <style>AOSP</style>
                         </googleJavaFormat>
                         <licenseHeader>
@@ -156,6 +156,9 @@
                 <configuration>
                     <source>${maven.compiler.source}</source>
                     <target>${maven.compiler.target}</target>
+                    <compilerArgs>
+                        <compilerArg>-proc:full</compilerArg>
+                    </compilerArgs>
                 </configuration>
             </plugin>
             <!-- Execute unit tests -->