diff --git a/gateleen-core/src/main/java/org/swisspush/gateleen/core/resource/CopyTask.java b/gateleen-core/src/main/java/org/swisspush/gateleen/core/resource/CopyTask.java
index 9868c527c..ae7b54e6f 100644
--- a/gateleen-core/src/main/java/org/swisspush/gateleen/core/resource/CopyTask.java
+++ b/gateleen-core/src/main/java/org/swisspush/gateleen/core/resource/CopyTask.java
@@ -8,9 +8,9 @@
  * @author https://github.com/ljucam [Mario Ljuca]
  */
 public class CopyTask {
-    private String sourceUri;
-    private String destinationUri;
-    private MultiMap headers;
+    private final String sourceUri;
+    private final String destinationUri;
+    private final MultiMap headers;
 
     public CopyTask(String sourceUri, String destinationUri, MultiMap headers) {
         this.sourceUri = sourceUri;