--- a/artifacts/src/main/java/org/dive4elements/river/artifacts/model/extreme/Curve.java	Fri Feb 25 17:17:56 2022 +0100
+++ b/artifacts/src/main/java/org/dive4elements/river/artifacts/model/extreme/Curve.java	Wed Mar 02 10:26:50 2022 +0100
@@ -22,13 +22,14 @@
 
 import org.apache.commons.math.exception.MathIllegalArgumentException;
 
-import org.apache.log4j.Logger;
+import org.apache.logging.log4j.Logger;
+import org.apache.logging.log4j.LogManager;
 
 /** An extrapolating W/Q function/curve. */
 public class Curve
 implements   Serializable, Function
 {
-    private static Logger log = Logger.getLogger(Curve.class);
+    private static Logger log = LogManager.getLogger(Curve.class);
 
     protected double [] qs;
     protected double [] ws;