diff --git a/.classpath b/.classpath
index 5e7942a..f47fc61 100644
--- a/.classpath
+++ b/.classpath
@@ -31,9 +31,9 @@
 			<attribute name="maven.pomderived" value="true"/>
 		</attributes>
 	</classpathentry>
-	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER">
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-21">
 		<attributes>
-			<attribute name="module" value="true"/>
+			<attribute name="maven.pomderived" value="true"/>
 		</attributes>
 	</classpathentry>
 	<classpathentry kind="output" path="target/classes"/>
diff --git a/pom.xml b/pom.xml
index ce1635d..4c470eb 100644
--- a/pom.xml
+++ b/pom.xml
@@ -93,4 +93,18 @@
 			<scope>test</scope>
 		</dependency>
 	</dependencies>
+
+	<build>
+		<plugins>
+			<plugin>
+				<artifactId>maven-compiler-plugin</artifactId>
+				<version>${maven-compiler-plugin.version}</version>
+				<configuration>
+					<source>21</source>
+					<target>21</target>
+					<encoding>UTF-8</encoding>
+				</configuration>
+			</plugin>
+		</plugins>
+	</build>
 </project>
\ No newline at end of file