diff --git a/core/Changes b/core/Changes
index 85f9f42..ccc96b2 100644
--- a/core/Changes
+++ b/core/Changes
@@ -1,6 +1,8 @@
 # version 0.62
 18/03/2019
    - Added close index controller (margaretha)
+11/04/2019
+   - Fixed multiple Jackson implementations (margaretha)   
 
 # version 0.61.6
 06/02/2019
diff --git a/core/pom.xml b/core/pom.xml
index eed745d..aadb9b8 100644
--- a/core/pom.xml
+++ b/core/pom.xml
@@ -147,6 +147,24 @@
 			<groupId>com.sun.jersey</groupId>
 			<artifactId>jersey-json</artifactId>
 			<version>${jersey.version}</version>
+			<exclusions>
+				<exclusion>
+					<groupId>org.codehaus.jackson</groupId>
+					<artifactId>jackson-core-asl</artifactId>
+				</exclusion>
+				<exclusion>
+					<groupId>org.codehaus.jackson</groupId>
+					<artifactId>jackson-mapper-asl</artifactId>
+				</exclusion>
+				<exclusion>
+					<groupId>org.codehaus.jackson</groupId>
+					<artifactId>jackson-jaxrs</artifactId>
+				</exclusion>
+				<exclusion>
+					<groupId>org.codehaus.jackson</groupId>
+					<artifactId>jackson-xc</artifactId>
+				</exclusion>
+			</exclusions>
 		</dependency>
 		<dependency>
 			<groupId>net.minidev</groupId>
diff --git a/core/src/main/java/de/ids_mannheim/korap/dto/FoundryDto.java b/core/src/main/java/de/ids_mannheim/korap/dto/FoundryDto.java
index 26cf383..c8f68b5 100644
--- a/core/src/main/java/de/ids_mannheim/korap/dto/FoundryDto.java
+++ b/core/src/main/java/de/ids_mannheim/korap/dto/FoundryDto.java
@@ -4,9 +4,6 @@
 import java.util.Map;
 import java.util.Set;
 
-import org.codehaus.jackson.map.annotate.JsonSerialize;
-import org.codehaus.jackson.map.annotate.JsonSerialize.Inclusion;
-
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonInclude.Include;
 
@@ -23,7 +20,7 @@
 @Getter
 @Setter
 @JsonInclude(Include.NON_EMPTY) // new fasterxml annotation, not used by current jersey version
-@JsonSerialize(include=Inclusion.NON_EMPTY) // old codehouse annotation, used by jersey
+//@JsonSerialize(include=Inclusion.NON_EMPTY) // old codehouse annotation, used by jersey
 public class FoundryDto {
 
     private String code;
@@ -33,7 +30,7 @@
     @Getter
     @Setter
     @JsonInclude(Include.NON_EMPTY)
-    @JsonSerialize(include=Inclusion.NON_EMPTY) // old codehouse annotation used by jersey
+//    @JsonSerialize(include=Inclusion.NON_EMPTY) // old codehouse annotation used by jersey
     public class Layer {
         private String code;
         private String description;
@@ -43,7 +40,7 @@
     @Getter
     @Setter
     @JsonInclude(Include.NON_EMPTY)
-    @JsonSerialize(include=Inclusion.NON_EMPTY) // old codehouse annotation used by jersey
+//    @JsonSerialize(include=Inclusion.NON_EMPTY) // old codehouse annotation used by jersey
     public class Key implements Comparable<Key>{
 
         private String code;