diff --git a/be-graphes-algos/src/main/java/org/insa/graphs/algorithm/shortestpath/AStarAlgorithm.java b/be-graphes-algos/src/main/java/org/insa/graphs/algorithm/shortestpath/AStarAlgorithm.java
index d76e03b..d447351 100644
--- a/be-graphes-algos/src/main/java/org/insa/graphs/algorithm/shortestpath/AStarAlgorithm.java
+++ b/be-graphes-algos/src/main/java/org/insa/graphs/algorithm/shortestpath/AStarAlgorithm.java
@@ -1,11 +1,5 @@
 package org.insa.graphs.algorithm.shortestpath;
 
-import java.util.HashMap;
-
-import org.insa.graphs.algorithm.ArcInspectorFactory;
-import org.insa.graphs.algorithm.AbstractInputData.Mode;
-import org.insa.graphs.algorithm.utils.BinaryHeap;
-import org.insa.graphs.model.Arc;
 import org.insa.graphs.model.Node;
 
 public class AStarAlgorithm extends DijkstraAlgorithm {
diff --git a/be-graphes-algos/src/test/java/org/insa/graphs/algorithm/shortestpath/ShortestPathAlgorithmTest.java b/be-graphes-algos/src/test/java/org/insa/graphs/algorithm/shortestpath/ShortestPathAlgorithmTest.java
index f979098..b82a3e1 100644
--- a/be-graphes-algos/src/test/java/org/insa/graphs/algorithm/shortestpath/ShortestPathAlgorithmTest.java
+++ b/be-graphes-algos/src/test/java/org/insa/graphs/algorithm/shortestpath/ShortestPathAlgorithmTest.java
@@ -10,16 +10,12 @@ import java.io.FileInputStream;
 import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.util.ArrayList;
-import java.util.Arrays;
 import java.util.Collection;
-import java.util.Collections;
 import java.util.List;
-import java.util.Random;
 import java.util.stream.Collectors;
 
 import org.insa.graphs.algorithm.ArcInspector;
 import org.insa.graphs.algorithm.ArcInspectorFactory;
-import org.insa.graphs.algorithm.AbstractInputData.Mode;
 import org.insa.graphs.algorithm.AbstractSolution.Status;
 import org.insa.graphs.model.Arc;
 import org.insa.graphs.model.Graph;
diff --git a/pom.xml b/pom.xml
index c49402a..9226a24 100644
--- a/pom.xml
+++ b/pom.xml
@@ -11,7 +11,7 @@
 	<name>be-graphes-all</name>
 
 	<properties>
-		<jdk.version>17</jdk.version>
+		<jdk.version>21</jdk.version>
 		<maven.compiler.source>${jdk.version}</maven.compiler.source>
 		<maven.compiler.target>${jdk.version}</maven.compiler.target>
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>