diff --git a/.classpath b/.classpath
index 603df75..901828c 100644
--- a/.classpath
+++ b/.classpath
@@ -12,9 +12,6 @@
 	<classpathentry kind="con" path="org.eclipse.jst.j2ee.internal.module.container"/>
 	<classpathentry kind="lib" path="lib/commons-fileupload-1.3.jar" sourcepath="lib/commons-fileupload-1.3-sources.jar"/>
 	<classpathentry kind="lib" path="lib/commons-lang3-3.1.jar" sourcepath="lib/commons-lang3-3.1-sources.jar"/>
-	<classpathentry kind="lib" path="lib/Logs/log4j-1.2.17.jar" sourcepath="lib/Logs/log4j-1.2.17-source.zip"/>
-	<classpathentry kind="lib" path="lib/Logs/slf4j-api-1.7.5.jar" sourcepath="lib/Logs/slf4j-api-1.7.5-sources.jar"/>
-	<classpathentry kind="lib" path="lib/Logs/slf4j-log4j12-1.7.5.jar" sourcepath="lib/Logs/slf4j-log4j12-1.7.5-sources.jar"/>
 	<classpathentry kind="lib" path="lib/UnitTesting/hamcrest-core-1.3.jar" sourcepath="lib/UnitTesting/hamcrest-core-1.3-sources.jar"/>
 	<classpathentry kind="lib" path="lib/UnitTesting/junit-4.12.jar" sourcepath="lib/UnitTesting/junit-4.12-sources.jar"/>
 	<classpathentry kind="lib" path="lib/devinsy-strings-0.11.4.jar" sourcepath="lib/devinsy-strings-0.11.4-sources.zip"/>
@@ -26,5 +23,9 @@
 	</classpathentry>
 	<classpathentry kind="lib" path="lib/xidyn-1.11.2.jar" sourcepath="lib/xidyn-1.11.2-sources.zip"/>
 	<classpathentry kind="lib" path="lib/commons-io-2.7.jar" sourcepath="lib/commons-io-2.7-sources.jar"/>
+	<classpathentry kind="lib" path="lib/Logs/log4j-api-2.17.0.jar" sourcepath="lib/Logs/log4j-api-2.17.0-sources.jar"/>
+	<classpathentry kind="lib" path="lib/Logs/log4j-core-2.17.0.jar" sourcepath="lib/Logs/log4j-core-2.17.0-sources.jar"/>
+	<classpathentry kind="lib" path="lib/Logs/log4j-slf4j-impl-2.17.0.jar" sourcepath="lib/Logs/log4j-slf4j-impl-2.17.0-sources.jar"/>
+	<classpathentry kind="lib" path="lib/Logs/slf4j-api-1.7.32.jar" sourcepath="lib/Logs/slf4j-api-1.7.32-sources.jar"/>
 	<classpathentry kind="output" path="bin"/>
 </classpath>
diff --git a/lib/Logs/log4j-1.2.17-source.zip b/lib/Logs/log4j-1.2.17-source.zip
deleted file mode 100644
index 2a9a7f4..0000000
Binary files a/lib/Logs/log4j-1.2.17-source.zip and /dev/null differ
diff --git a/lib/Logs/log4j-1.2.17.jar b/lib/Logs/log4j-1.2.17.jar
deleted file mode 100644
index 068867e..0000000
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diff --git a/lib/Logs/log4j-api-2.17.0-sources.jar b/lib/Logs/log4j-api-2.17.0-sources.jar
new file mode 100644
index 0000000..f895ea8
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diff --git a/lib/Logs/log4j-api-2.17.0.jar b/lib/Logs/log4j-api-2.17.0.jar
new file mode 100644
index 0000000..77af535
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diff --git a/lib/Logs/log4j-core-2.17.0-sources.jar b/lib/Logs/log4j-core-2.17.0-sources.jar
new file mode 100644
index 0000000..6d0e47a
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diff --git a/lib/Logs/log4j-core-2.17.0.jar b/lib/Logs/log4j-core-2.17.0.jar
new file mode 100644
index 0000000..256ff3d
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diff --git a/lib/Logs/log4j-slf4j-impl-2.17.0-sources.jar b/lib/Logs/log4j-slf4j-impl-2.17.0-sources.jar
new file mode 100644
index 0000000..490e97e
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diff --git a/lib/Logs/log4j-slf4j-impl-2.17.0.jar b/lib/Logs/log4j-slf4j-impl-2.17.0.jar
new file mode 100644
index 0000000..6501d11
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diff --git a/lib/Logs/slf4j-api-1.7.32-sources.jar b/lib/Logs/slf4j-api-1.7.32-sources.jar
new file mode 100644
index 0000000..e8c4f52
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diff --git a/lib/Logs/slf4j-api-1.7.32.jar b/lib/Logs/slf4j-api-1.7.32.jar
new file mode 100644
index 0000000..b16a078
Binary files /dev/null and b/lib/Logs/slf4j-api-1.7.32.jar differ
diff --git a/lib/Logs/slf4j-api-1.7.5-sources.jar b/lib/Logs/slf4j-api-1.7.5-sources.jar
deleted file mode 100644
index 51abe2b..0000000
Binary files a/lib/Logs/slf4j-api-1.7.5-sources.jar and /dev/null differ
diff --git a/lib/Logs/slf4j-api-1.7.5.jar b/lib/Logs/slf4j-api-1.7.5.jar
deleted file mode 100644
index 8766455..0000000
Binary files a/lib/Logs/slf4j-api-1.7.5.jar and /dev/null differ
diff --git a/lib/Logs/slf4j-log4j12-1.7.5-sources.jar b/lib/Logs/slf4j-log4j12-1.7.5-sources.jar
deleted file mode 100644
index ea1b93b..0000000
Binary files a/lib/Logs/slf4j-log4j12-1.7.5-sources.jar and /dev/null differ
diff --git a/lib/Logs/slf4j-log4j12-1.7.5.jar b/lib/Logs/slf4j-log4j12-1.7.5.jar
deleted file mode 100644
index afce5c2..0000000
Binary files a/lib/Logs/slf4j-log4j12-1.7.5.jar and /dev/null differ
diff --git a/src/fr/devinsy/kiss4web/Kiss4webLauncher.java b/src/fr/devinsy/kiss4web/Kiss4webLauncher.java
index 6e00eb4..755fa81 100644
--- a/src/fr/devinsy/kiss4web/Kiss4webLauncher.java
+++ b/src/fr/devinsy/kiss4web/Kiss4webLauncher.java
@@ -25,6 +25,8 @@ import javax.servlet.ServletContext;
 import javax.servlet.ServletContextEvent;
 
 import org.apache.commons.lang3.StringUtils;
+import org.apache.logging.log4j.core.config.Configurator;
+import org.apache.logging.log4j.core.config.DefaultConfiguration;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -64,7 +66,7 @@ public class Kiss4webLauncher implements javax.servlet.ServletContextListener
 
         if (StringUtils.isBlank(logFilePathname))
         {
-            org.apache.log4j.BasicConfigurator.configure();
+            Configurator.initialize(new DefaultConfiguration());
             logger.warn("Log configuration undefined, use of the basic configurator.");
         }
         else
@@ -79,12 +81,12 @@ public class Kiss4webLauncher implements javax.servlet.ServletContextListener
 
             if (new File(logFilePathname).exists())
             {
-                org.apache.log4j.PropertyConfigurator.configure(logFilePathname);
+                Configurator.initialize(null, logFilePathname);
             }
             else
             {
                 System.out.println("Log configuration FILE NOT FOUND (" + logFilePathname + "), use of the basic configurator.");
-                org.apache.log4j.BasicConfigurator.configure();
+                Configurator.initialize(new DefaultConfiguration());
             }
 
             logger = LoggerFactory.getLogger(this.getClass());
diff --git a/src/fr/devinsy/kiss4web/dispatcher/KissDispatcherUtils.java b/src/fr/devinsy/kiss4web/dispatcher/KissDispatcherUtils.java
index f504a6d..d442997 100644
--- a/src/fr/devinsy/kiss4web/dispatcher/KissDispatcherUtils.java
+++ b/src/fr/devinsy/kiss4web/dispatcher/KissDispatcherUtils.java
@@ -225,7 +225,7 @@ public class KissDispatcherUtils
         if (servletClass == null)
         {
             result = null;
-            logger.error("unknown page: [{}]", classPathname);
+            logger.warn("unknown page: [{}]", classPathname);
         }
         else
         {
diff --git a/test/FooSandbox.java b/test/FooSandbox.java
index b6b061b..953d3f0 100644
--- a/test/FooSandbox.java
+++ b/test/FooSandbox.java
@@ -17,6 +17,11 @@
  * You should have received a copy of the GNU Lesser General Public License
  * along with Kiss4web.  If not, see <http://www.gnu.org/licenses/>
  */
+import org.apache.logging.log4j.Level;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.core.config.Configurator;
+import org.apache.logging.log4j.core.config.DefaultConfiguration;
+
 import fr.devinsy.kiss4web.dispatcher.KissDispatcherUtils;
 
 /**
@@ -24,18 +29,15 @@ import fr.devinsy.kiss4web.dispatcher.KissDispatcherUtils;
  */
 public class FooSandbox
 {
-    private static org.apache.log4j.Logger logger;
+    private static org.apache.logging.log4j.Logger logger;
 
     static
     {
         // Initialize logger.
-        org.apache.log4j.Logger logger = null;
+        org.apache.logging.log4j.Logger logger = null;
 
-        org.apache.log4j.BasicConfigurator.configure();
-
-        logger = org.apache.log4j.Logger.getRootLogger();
-        // logger.setLevel (org.apache.log4j.Level.INFO);
-        logger.setLevel(org.apache.log4j.Level.INFO);
+        Configurator.initialize(new DefaultConfiguration());
+        Configurator.setRootLevel(Level.INFO);
 
         logger.info("Enter");
 
@@ -47,7 +49,7 @@ public class FooSandbox
         logger.info("... done.");
 
         logger.debug("Exit");
-        logger = org.apache.log4j.Logger.getLogger(FooSandbox.class.getName());
+        logger = LogManager.getLogger(FooSandbox.class.getName());
     }
 
     /**