diff --git a/jollyday-jackson/src/main/java/de/focus_shift/jollyday/jackson/JacksonConfigurationService.java b/jollyday-jackson/src/main/java/de/focus_shift/jollyday/jackson/JacksonConfigurationService.java
index 3e02cb2e3..1dc94140a 100644
--- a/jollyday-jackson/src/main/java/de/focus_shift/jollyday/jackson/JacksonConfigurationService.java
+++ b/jollyday-jackson/src/main/java/de/focus_shift/jollyday/jackson/JacksonConfigurationService.java
@@ -10,7 +10,7 @@
 
 public class JacksonConfigurationService implements ConfigurationService {
 
-  private final XMLUtil xmlUtil = new XMLUtil();
+  private static final XMLUtil xmlUtil = new XMLUtil();
 
   @Override
   public Configuration getConfiguration(ManagerParameter parameter) {
diff --git a/jollyday-jackson/src/main/java/de/focus_shift/jollyday/jackson/XMLUtil.java b/jollyday-jackson/src/main/java/de/focus_shift/jollyday/jackson/XMLUtil.java
index 8f2a8f12a..fa0252a8c 100644
--- a/jollyday-jackson/src/main/java/de/focus_shift/jollyday/jackson/XMLUtil.java
+++ b/jollyday-jackson/src/main/java/de/focus_shift/jollyday/jackson/XMLUtil.java
@@ -11,7 +11,7 @@
 
 public class XMLUtil {
 
-  private final JacksonMapperCreator mapper = new JacksonMapperCreator();
+  private static final XmlMapper mapper = new JacksonMapperCreator().create();
 
   /**
    * Unmarshalls the configuration from the stream. Uses <code>jackson</code> for
@@ -22,7 +22,7 @@ public class XMLUtil {
    */
   public Configuration unmarshallConfiguration(InputStream stream) {
     try {
-      return mapper.create().readValue(stream, Configuration.class);
+      return mapper.readValue(stream, Configuration.class);
     } catch (Exception e) {
       throw new IllegalStateException("Cannot parse holidays XML file.", e);
     }