diff --git a/oaipmh-core/pom.xml b/oaipmh-core/pom.xml
index f1848797c1ff32e914312d5deee3981eab33c48a..500d5e4117d4d6834211a556aa293b09803bbc56 100644
--- a/oaipmh-core/pom.xml
+++ b/oaipmh-core/pom.xml
@@ -69,6 +69,16 @@
 			<version>${junit.version}</version>
 			<scope>test</scope>
 		</dependency>
+		<dependency>
+			<groupId>org.apache.logging.log4j</groupId>
+			<artifactId>log4j-api</artifactId>
+			<version>${log4j.version}</version>
+		</dependency>
+		<dependency>
+			<groupId>org.apache.logging.log4j</groupId>
+			<artifactId>log4j-core</artifactId>
+			<version>${log4j.version}</version>
+		</dependency>
 		<dependency>
 			<groupId>org.elasticsearch.client</groupId>
 			<artifactId>elasticsearch-rest-high-level-client</artifactId>
diff --git a/oaipmh-webapp/pom.xml b/oaipmh-webapp/pom.xml
index f6001715a2733028cb89b8c0978682a997fe6372..611870c102efaa928660b7364f42fc193afe44aa 100644
--- a/oaipmh-webapp/pom.xml
+++ b/oaipmh-webapp/pom.xml
@@ -1,17 +1,14 @@
-<project xmlns="http://maven.apache.org/POM/4.0.0"
-	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
 	<modelVersion>4.0.0</modelVersion>
 	<parent>
 		<artifactId>oaipmh</artifactId>
 		<groupId>info.textgrid.middleware</groupId>
-    <version>4.3.0-SNAPSHOT</version>
+		<version>4.3.0-SNAPSHOT</version>
 	</parent>
-	<groupId>info.textgrid.middleware</groupId>
 	<artifactId>oaipmh-webapp</artifactId>
 	<packaging>war</packaging>
 	<name>DARIAHDE :: OAI-PMH DataProvider :: Webapp</name>
-    <url>https://projects.gwdg.de/projects/oai-pmh</url>
+	<url>https://projects.gwdg.de/projects/oai-pmh</url>
 	<profiles>
 		<profile>
 			<id>dhrep.deb</id>
@@ -51,12 +48,6 @@
 		</profile>
 	</profiles>
 	<dependencies>
-		<dependency>
-			<groupId>junit</groupId>
-			<artifactId>junit</artifactId>
-			<version>${junit.version}</version>
-			<scope>test</scope>
-		</dependency>
 		<dependency>
 			<groupId>org.springframework</groupId>
 			<artifactId>spring-core</artifactId>
diff --git a/oaipmh-webapp/src/main/webapp/WEB-INF/oaipmh.dariah.properties b/oaipmh-webapp/src/main/webapp/WEB-INF/oaipmh.dariah.properties
index b99f3870360f345c8cb85b74646907f40fdcc479..faff8c1e3f4b2e46d95fbab95f5539e807788048 100644
--- a/oaipmh-webapp/src/main/webapp/WEB-INF/oaipmh.dariah.properties
+++ b/oaipmh-webapp/src/main/webapp/WEB-INF/oaipmh.dariah.properties
@@ -9,8 +9,8 @@ RS_ENDPOINT = https://repository.de.dariah.eu/1.0/oaipmh
 ############################
 
 elasticSearch.url = 127.0.0.1
-elasticSearch.port = 9202, 9203
-elasticSearch.clusterName = ***
+elasticSearch.ports = 9202, 9203
+elasticSearch.index = ***
 elasticSearch.type = metadata
 elasticSearch.itemLimit = 100
 
diff --git a/pom.xml b/pom.xml
index 96b744d377d144f648e417ecb8ba439eac97bc0c..14b1ce9bffcd99087057b41abdac7d16dcbcc3ce 100644
--- a/pom.xml
+++ b/pom.xml
@@ -20,6 +20,7 @@
     <jetty-maven-plugin.version>9.4.12.v20180830</jetty-maven-plugin.version>
 		<junit.version>4.13.1</junit.version>
     <json.version>20190722</json.version>
+		<log4j.version>2.17.1</log4j.version>
     <maven-antrun-plugin.version>1.3</maven-antrun-plugin.version>
     <maven-compiler-plugin.version>3.8.1</maven-compiler-plugin.version>
     <maven-deploy-plugin.version>2.8.2</maven-deploy-plugin.version>