--- a/artifacts/src/main/java/org/dive4elements/river/artifacts/access/ExtremeAccess.java	Fri Feb 25 17:17:56 2022 +0100
+++ b/artifacts/src/main/java/org/dive4elements/river/artifacts/access/ExtremeAccess.java	Wed Mar 02 10:26:50 2022 +0100
@@ -17,14 +17,15 @@
 import java.util.ArrayList;
 import java.util.List;
 
-import org.apache.log4j.Logger;
+import org.apache.logging.log4j.Logger;
+import org.apache.logging.log4j.LogManager;
 
 /** Access data used for extreme value analysis. */
 public class ExtremeAccess
 extends      RangeAccess
 {
     /** Our private log. */
-    private static Logger log = Logger.getLogger(ExtremeAccess.class);
+    private static Logger log = LogManager.getLogger(ExtremeAccess.class);
 
     protected Long start;
     protected Long end;