diff --git a/sample/archidata/basic/WebLauncher.java b/sample/archidata/basic/WebLauncher.java
index ab08261..b28e82c 100755
--- a/sample/archidata/basic/WebLauncher.java
+++ b/sample/archidata/basic/WebLauncher.java
@@ -99,7 +99,7 @@ public class WebLauncher {
 		Runtime.getRuntime().addShutdownHook(new Thread(new Runnable() {
 			@Override
 			public void run() {
-				System.out.println("Stopping server..");
+				WebLauncher.LOGGER.info("Stopping server..");
 				serverLink.shutdownNow();
 			}
 		}, "shutdownHook"));
diff --git a/src/org/kar/archidata/UpdateJwtPublicKey.java b/src/org/kar/archidata/UpdateJwtPublicKey.java
index 379a61b..3bcb02e 100644
--- a/src/org/kar/archidata/UpdateJwtPublicKey.java
+++ b/src/org/kar/archidata/UpdateJwtPublicKey.java
@@ -2,14 +2,17 @@ package org.kar.archidata;
 
 import org.kar.archidata.tools.ConfigBaseVariable;
 import org.kar.archidata.tools.JWTWrapper;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 public class UpdateJwtPublicKey extends Thread {
+	private static final Logger LOGGER = LoggerFactory.getLogger(UpdateJwtPublicKey.class);
 	boolean kill = false;
 
 	@Override
 	public void run() {
 		if (ConfigBaseVariable.getSSOAddress() == null) {
-			System.out.println("SSO INTERFACE is not provided ==> work alone.");
+			LOGGER.warn("SSO INTERFACE is not provided ==> work alone.");
 			// No SO provided, kill the thread.
 			return;
 		}
@@ -19,7 +22,7 @@ public class UpdateJwtPublicKey extends Thread {
 				JWTWrapper.initLocalTokenRemote(ConfigBaseVariable.getSSOAddress(), "archidata");
 			} catch (final Exception e1) {
 				e1.printStackTrace();
-				System.out.println("Can not retreive the basic tocken");
+				LOGGER.error("Can not retreive the basic tocken");
 				return;
 			}
 			try {
diff --git a/src/org/kar/archidata/dataAccess/DBAccessMorphia.java b/src/org/kar/archidata/dataAccess/DBAccessMorphia.java
index 1c13577..dc7f4f5 100644
--- a/src/org/kar/archidata/dataAccess/DBAccessMorphia.java
+++ b/src/org/kar/archidata/dataAccess/DBAccessMorphia.java
@@ -529,7 +529,7 @@ public class DBAccessMorphia extends DBAccess {
 			final Document insertedDocument = collection.find(new Document("_id", insertedId)).first();
 
 			// Afficher le document récupéré
-			System.out.println("Inserted document: " + insertedDocument);
+			LOGGER.trace("Inserted document: " + insertedDocument);
 
 		} catch (final Exception ex) {
 			LOGGER.error("Fail SQL request: {}", ex.getMessage());
diff --git a/test/src/test/kar/archidata/apiExtern/WebLauncher.java b/test/src/test/kar/archidata/apiExtern/WebLauncher.java
index ec7db65..3f7804d 100755
--- a/test/src/test/kar/archidata/apiExtern/WebLauncher.java
+++ b/test/src/test/kar/archidata/apiExtern/WebLauncher.java
@@ -68,22 +68,22 @@ public class WebLauncher {
 
 	public void plop(final String aaa) {
 		// List available Image Readers
-		System.out.println("Available Image Readers:");
+		WebLauncher.LOGGER.trace("Available Image Readers:");
 		final Iterator<ImageReader> readers = ImageIO.getImageReadersByFormatName(aaa);
 		while (readers.hasNext()) {
 			final ImageReader reader = readers.next();
-			System.out.println("Reader: " + reader.getOriginatingProvider().getDescription(null));
-			System.out.println("Reader CN: " + reader.getOriginatingProvider().getPluginClassName());
+			WebLauncher.LOGGER.trace("Reader: " + reader.getOriginatingProvider().getDescription(null));
+			WebLauncher.LOGGER.trace("Reader CN: " + reader.getOriginatingProvider().getPluginClassName());
 			// ImageIO.deregisterServiceProvider(reader.getOriginatingProvider());
 		}
 
 		// List available Image Writers
-		System.out.println("\nAvailable Image Writers:");
+		WebLauncher.LOGGER.trace("\nAvailable Image Writers:");
 		final Iterator<ImageWriter> writers = ImageIO.getImageWritersByFormatName(aaa);
 		while (writers.hasNext()) {
 			final ImageWriter writer = writers.next();
-			System.out.println("Writer: " + writer.getOriginatingProvider().getDescription(null));
-			System.out.println("Writer CN: " + writer.getOriginatingProvider().getPluginClassName());
+			WebLauncher.LOGGER.trace("Writer: " + writer.getOriginatingProvider().getDescription(null));
+			WebLauncher.LOGGER.trace("Writer CN: " + writer.getOriginatingProvider().getPluginClassName());
 		}
 	}
 
@@ -135,7 +135,7 @@ public class WebLauncher {
 		Runtime.getRuntime().addShutdownHook(new Thread(new Runnable() {
 			@Override
 			public void run() {
-				System.out.println("Stopping server..");
+				LOGGER.warn("Stopping server..");
 				serverLink.shutdownNow();
 			}
 		}, "shutdownHook"));