diff --git a/.github/workflows/maven.yml b/.github/workflows/maven.yml
index 1ce75e8..3d796be 100644
--- a/.github/workflows/maven.yml
+++ b/.github/workflows/maven.yml
@@ -19,6 +19,6 @@ jobs:
     - name: Set up JDK 1.8
       uses: actions/setup-java@v1
       with:
-        java-version: 11
+        java-version: 17
     - name: Build with Maven
       run: mvn -B package --file pom.xml
diff --git a/pom.xml b/pom.xml
index 7bd865f..ae6adcc 100644
--- a/pom.xml
+++ b/pom.xml
@@ -10,7 +10,7 @@
 
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
-		<java.version>11</java.version>
+		<java.version>17</java.version>
 		<org.junit.jupiter>5.3.0-M1</org.junit.jupiter>
 		<org.slf4j>1.7.36</org.slf4j>
 		<org.apache.logging.log4j>2.17.2</org.apache.logging.log4j>
@@ -47,6 +47,12 @@
 			<artifactId>slf4j-api</artifactId>
 			<version>${org.slf4j}</version>
 		</dependency>
+		<dependency>
+			<groupId>jakarta.annotation</groupId>
+			<artifactId>jakarta.annotation-api</artifactId>
+			<version>1.3.5</version>
+			<scope>provided</scope>
+		</dependency>
 		<dependency>
 			<groupId>org.apache.logging.log4j</groupId>
 			<artifactId>log4j-api</artifactId>
@@ -140,12 +146,29 @@
 			<plugin>
 				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-compiler-plugin</artifactId>
-				<version>3.8.0</version>
+				<version>3.14.0</version>
 				<configuration>
 					<release>${java.version}</release>
 					<compilerArgs>-proc:none</compilerArgs>
 				</configuration>
 			</plugin>
+		    <plugin>
+		      <groupId>org.openrewrite.maven</groupId>
+		      <artifactId>rewrite-maven-plugin</artifactId>
+		      <version>6.15.0</version>
+		      <configuration>
+		        <activeRecipes>
+		          <recipe>org.openrewrite.java.migrate.UpgradeToJava17</recipe>
+		        </activeRecipes>
+		      </configuration>
+		      <dependencies>
+		        <dependency>
+		          <groupId>org.openrewrite.recipe</groupId>
+		          <artifactId>rewrite-migrate-java</artifactId>
+		          <version>3.14.1</version>
+		        </dependency>
+		      </dependencies>
+		    </plugin>
 		</plugins>
 	</build>
 	<scm>
diff --git a/src/main/java/de/kreth/property2java/GeneratorException.java b/src/main/java/de/kreth/property2java/GeneratorException.java
index 3083d4e..1529503 100644
--- a/src/main/java/de/kreth/property2java/GeneratorException.java
+++ b/src/main/java/de/kreth/property2java/GeneratorException.java
@@ -1,7 +1,10 @@
 package de.kreth.property2java;
 
+import java.io.Serial;
+
 public class GeneratorException extends Exception {
 
+	@Serial
 	private static final long serialVersionUID = -7319030228448260990L;
 
 	public GeneratorException(String message, Throwable cause) {
diff --git a/src/main/java/de/kreth/property2java/processor/ProcessorConfiguration.java b/src/main/java/de/kreth/property2java/processor/ProcessorConfiguration.java
index ce423e7..1fefdf9 100644
--- a/src/main/java/de/kreth/property2java/processor/ProcessorConfiguration.java
+++ b/src/main/java/de/kreth/property2java/processor/ProcessorConfiguration.java
@@ -49,8 +49,7 @@ public class ProcessorConfiguration implements Configuration {
 	public String getPackage() {
 
 		String packageName = "";
-		if (element instanceof TypeElement) {
-			TypeElement typeElement = (TypeElement) element;
+		if (element instanceof TypeElement typeElement) {
 			PackageElement packageElement = (PackageElement) typeElement.getEnclosingElement();
 			packageName = packageElement.getQualifiedName().toString();
 		}
diff --git a/src/test/java/de/kreth/property2java/TestPropertiesSource.java b/src/test/java/de/kreth/property2java/TestPropertiesSource.java
index ed73950..0142c9b 100644
--- a/src/test/java/de/kreth/property2java/TestPropertiesSource.java
+++ b/src/test/java/de/kreth/property2java/TestPropertiesSource.java
@@ -10,23 +10,34 @@ import de.kreth.property2java.generated.GenerateTheTest;
 public class TestPropertiesSource {
 
 	public static StringReader testProperties() {
-		return new StringReader("\r\n" + "label = \r\n" + "\r\n" + "label.addarticle    = Add Article\r\n"
-				+ "label.cancel        = Cancel\r\n" + "label.close         = Close\r\n"
-				+ "label.delete        = Delete\r\n" + "label.discart       = Discart\r\n"
-				+ "label.loggedin      = Logged in:\r\n" + "label.logout        = Logout\r\n"
-				+ "label.ok            = OK\r\n" + "label.store         = Store\r\n"
-				+ "label.preview       = Preview\r\n" + "label.open          = Open\r\n"
-				+ "label.user.register = Register\r\n" + "\r\n"
-				+ "message.article.priceerror             = Please set the price.\r\n"
-				+ "message.delete.text                    = Delete {0}?\r\n"
-				+ "message.delete.title                   = Really delete?\r\n"
-				+ "message.invoiceitem.allfieldsmustbeset = Start, end and article must not be \\r\\n"
-				+ "                                         empty!\r\n"
-				+ "message.invoiceitem.startbeforeend     = End must be later than start.\r\n"
-				+ "message.user.create.success            = Thanks {0} created!\r\n"
-				+ "message.user.loginfailure              = Login Error! Wrong user or password?\r\n"
-				+ "message.user.passwordmissmatch         = Passwords don't match.\r\n"
-				+ "message.with.five.placeholders         = Third is first{2}, then last \"{4}\", second={1}, fourth={3} and first is last={0}\r\n");
+		return new StringReader("""
+				
+				label = 
+				
+				label.addarticle    = Add Article
+				label.cancel        = Cancel
+				label.close         = Close
+				label.delete        = Delete
+				label.discart       = Discart
+				label.loggedin      = Logged in:
+				label.logout        = Logout
+				label.ok            = OK
+				label.store         = Store
+				label.preview       = Preview
+				label.open          = Open
+				label.user.register = Register
+				
+				message.article.priceerror             = Please set the price.
+				message.delete.text                    = Delete {0}?
+				message.delete.title                   = Really delete?
+				message.invoiceitem.allfieldsmustbeset = Start, end and article must not be \\r\\n\
+				                                         empty!
+				message.invoiceitem.startbeforeend     = End must be later than start.
+				message.user.create.success            = Thanks {0} created!
+				message.user.loginfailure              = Login Error! Wrong user or password?
+				message.user.passwordmissmatch         = Passwords don't match.
+				message.with.five.placeholders         = Third is first{2}, then last "{4}", second={1}, fourth={3} and first is last={0}
+				""");
 	}
 	
 	public static void main(String[] args) throws IOException {
diff --git a/src/test/java/de/kreth/property2java/generated/GenerateTheTest.java b/src/test/java/de/kreth/property2java/generated/GenerateTheTest.java
index 026949b..5a26eac 100644
--- a/src/test/java/de/kreth/property2java/generated/GenerateTheTest.java
+++ b/src/test/java/de/kreth/property2java/generated/GenerateTheTest.java
@@ -3,7 +3,6 @@ package de.kreth.property2java.generated;
 import java.io.IOException;
 import java.io.Reader;
 import java.nio.file.Path;
-import java.nio.file.Paths;
 import java.util.EnumSet;
 import java.util.HashMap;
 import java.util.Map;
@@ -25,7 +24,7 @@ public class GenerateTheTest {
 	public static final String RESOURCE_BUNDLE = "resource_bundle.properties";
 	
 	public static void main(String[] args) throws IOException, GeneratorException {
-		Path current = Paths.get(".", "src", "test", "java", "de", "kreth", "property2java", "generated").toAbsolutePath().normalize();
+		Path current = Path.of(".", "src", "test", "java", "de", "kreth", "property2java", "generated").toAbsolutePath().normalize();
 		System.out.println(current);
 		
 		withUnaryOperatorParameter(current);