diff --git a/pom.xml b/pom.xml
index 158fbb0..92b800f 100644
--- a/pom.xml
+++ b/pom.xml
@@ -6,7 +6,7 @@
 
     <groupId>org.sadtech.autoresponder</groupId>
     <artifactId>autoresponder</artifactId>
-    <version>1.5.0-RELEASE</version>
+    <version>1.5.1-SNAPSHOT</version>
     <packaging>jar</packaging>
     <build>
         <plugins>
@@ -23,14 +23,14 @@
     </build>
 
     <properties>
-        <log4j>1.2.17</log4j>
+        <slf4j.ver>1.7.26</slf4j.ver>
     </properties>
 
     <dependencies>
         <dependency>
-            <groupId>log4j</groupId>
-            <artifactId>log4j</artifactId>
-            <version>${log4j}</version>
+            <groupId>org.slf4j</groupId>
+            <artifactId>slf4j-api</artifactId>
+            <version>${slf4j.ver}</version>
         </dependency>
     </dependencies>
 
diff --git a/src/main/java/org/sadtech/autoresponder/Autoresponder.java b/src/main/java/org/sadtech/autoresponder/Autoresponder.java
index 1dc1ace..f95d38d 100644
--- a/src/main/java/org/sadtech/autoresponder/Autoresponder.java
+++ b/src/main/java/org/sadtech/autoresponder/Autoresponder.java
@@ -1,11 +1,12 @@
 package org.sadtech.autoresponder;
 
-import org.apache.log4j.Logger;
 import org.sadtech.autoresponder.compare.UnitPriorityComparator;
-import org.sadtech.autoresponder.entity.UnitPointer;
 import org.sadtech.autoresponder.entity.Unit;
+import org.sadtech.autoresponder.entity.UnitPointer;
 import org.sadtech.autoresponder.service.UnitPointerService;
 import org.sadtech.autoresponder.util.Parser;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 import java.util.HashSet;
 import java.util.Optional;
@@ -15,7 +16,7 @@ import java.util.regex.Pattern;
 
 public class Autoresponder {
 
-    private static final Logger log = Logger.getLogger(Autoresponder.class);
+    private static final Logger log = LoggerFactory.getLogger(Autoresponder.class);
 
     private Set<Unit> menuUnits;
     private UnitPointerService unitPointerService;
diff --git a/src/main/java/org/sadtech/autoresponder/entity/Unit.java b/src/main/java/org/sadtech/autoresponder/entity/Unit.java
index 66e01b0..1a160e6 100644
--- a/src/main/java/org/sadtech/autoresponder/entity/Unit.java
+++ b/src/main/java/org/sadtech/autoresponder/entity/Unit.java
@@ -9,21 +9,16 @@ public abstract class Unit {
 
     private Set<String> keyWords;
     private Pattern pattern;
-    private Integer matchThreshold;
-    private Integer priority;
+    private Integer matchThreshold = 10;
+    private Integer priority = 10;
     private Set<Unit> nextUnits;
 
     public Unit() {
-        priority = 10;
-        matchThreshold = 10;
+
     }
 
-    public Unit(Set<String> keyWords, Pattern pattern, Integer matchThreshold, Integer priority, Set<Unit> nextUnits) {
-        this.keyWords = keyWords;
-        this.pattern = pattern;
-        this.matchThreshold = matchThreshold;
-        this.priority = priority;
-        this.nextUnits = nextUnits;
+    public Unit(Unit... nextUnit) {
+        nextUnits = new HashSet(nextUnits);
     }
 
     public void setKeyWord(String keyWord) {
diff --git a/src/main/java/org/sadtech/autoresponder/service/UnitPointerServiceImpl.java b/src/main/java/org/sadtech/autoresponder/service/UnitPointerServiceImpl.java
index ca6f9ad..c9e42f3 100644
--- a/src/main/java/org/sadtech/autoresponder/service/UnitPointerServiceImpl.java
+++ b/src/main/java/org/sadtech/autoresponder/service/UnitPointerServiceImpl.java
@@ -1,13 +1,14 @@
 package org.sadtech.autoresponder.service;
 
-import org.apache.log4j.Logger;
 import org.sadtech.autoresponder.entity.UnitPointer;
 import org.sadtech.autoresponder.repository.UnitPointerRepository;
 import org.sadtech.autoresponder.repository.UnitPointerRepositoryMap;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 public class UnitPointerServiceImpl implements UnitPointerService {
 
-    private static final Logger log = Logger.getLogger(UnitPointerServiceImpl.class);
+    private static final Logger log = LoggerFactory.getLogger(UnitPointerServiceImpl.class);
 
     private UnitPointerRepository unitPointerRepository;