diff --git a/hawkbit-dmf/hawkbit-dmf-amqp/src/main/java/org/eclipse/hawkbit/amqp/DmfApiConfiguration.java b/hawkbit-dmf/hawkbit-dmf-amqp/src/main/java/org/eclipse/hawkbit/amqp/DmfApiConfiguration.java
index 0574565a0..e5331ba9d 100644
--- a/hawkbit-dmf/hawkbit-dmf-amqp/src/main/java/org/eclipse/hawkbit/amqp/DmfApiConfiguration.java
+++ b/hawkbit-dmf/hawkbit-dmf-amqp/src/main/java/org/eclipse/hawkbit/amqp/DmfApiConfiguration.java
@@ -9,8 +9,6 @@
  */
 package org.eclipse.hawkbit.amqp;
 
-import static org.eclipse.hawkbit.dmf.DmfMessageConverter.DMF_JSON_MODEL_PACKAGE;
-
 import java.sql.SQLException;
 import java.time.Duration;
 import java.util.Arrays;
@@ -52,6 +50,7 @@ import org.springframework.context.annotation.PropertySource;
 import org.springframework.core.retry.RetryPolicy;
 import org.springframework.core.retry.RetryTemplate;
 import org.springframework.util.ErrorHandler;
+import org.springframework.util.ObjectUtils;
 import tools.jackson.databind.json.JsonMapper;
 
 /**
@@ -99,8 +98,12 @@ public class DmfApiConfiguration {
     @ConditionalOnMissingBean(name = "dmfMessageConverter") // override it if needed to add / edit trusted packages or need other customization
     public MessageConverter dmfMessageConverter(
             final JsonMapper jsonMapper,
-            @Value("${hawkbit.dmf.trusted-packages:" + DMF_JSON_MODEL_PACKAGE + "}") final String trustedPackages) {
-        return new DmfMessageConverter(jsonMapper, Arrays.stream(trustedPackages.split(",")).map(String::trim).toArray(String[]::new));
+            @Value("${hawkbit.dmf.trusted-packages:}") final String trustedPackages) {
+        return new DmfMessageConverter(
+                jsonMapper,
+                ObjectUtils.isEmpty(trustedPackages)
+                        ? new String[0]
+                        : Arrays.stream(trustedPackages.split(",")).map(String::trim).toArray(String[]::new));
     }
 
     /**
diff --git a/hawkbit-dmf/hawkbit-dmf-api/src/main/java/org/eclipse/hawkbit/dmf/DmfMessageConverter.java b/hawkbit-dmf/hawkbit-dmf-api/src/main/java/org/eclipse/hawkbit/dmf/DmfMessageConverter.java
index c37b66f7f..cad684ae5 100644
--- a/hawkbit-dmf/hawkbit-dmf-api/src/main/java/org/eclipse/hawkbit/dmf/DmfMessageConverter.java
+++ b/hawkbit-dmf/hawkbit-dmf-api/src/main/java/org/eclipse/hawkbit/dmf/DmfMessageConverter.java
@@ -9,6 +9,9 @@
  */
 package org.eclipse.hawkbit.dmf;
 
+import java.util.Arrays;
+import java.util.stream.Stream;
+
 import org.jspecify.annotations.NonNull;
 import org.jspecify.annotations.Nullable;
 import org.springframework.amqp.core.Message;
@@ -22,14 +25,33 @@ import tools.jackson.databind.json.JsonMapper;
 // empty payload is empty byte[] and not try to convert it to Object (which fail since it is not JSON)
 public class DmfMessageConverter extends JacksonJsonMessageConverter {
 
-    public static final String DMF_JSON_MODEL_PACKAGE = "org.eclipse.hawkbit.dmf.json.model";
+    private static final String DMF_JSON_MODEL_PACKAGE = "org.eclipse.hawkbit.dmf.json.model";
 
-    public DmfMessageConverter(final String... trustedPackages) {
-        this(new JsonMapper(), trustedPackages);
+    /**
+     * Constructor unsing default {@link JsonMapper}, i.e. <code>new JsonMapper()</code>
+     *
+     * @param trustedPackagesExt {@link DmfMessageConverter} always trust {@link #DMF_JSON_MODEL_PACKAGE}. If any additional packages
+     *         shall be trusted provided here
+     */
+    public DmfMessageConverter(final String... trustedPackagesExt) {
+        this(new JsonMapper(), trustedPackagesExt);
     }
 
-    public DmfMessageConverter(final JsonMapper jsonMapper, final String... trustedPackages) {
-        super(jsonMapper, trustedPackages.length == 0 ? new String[] { DMF_JSON_MODEL_PACKAGE } : trustedPackages);
+    /**
+     * Constructor with specified {@link JsonMapper}
+     *
+     * @param jsonMapper the {@link JsonMapper} to use for conversion
+     * @param trustedPackagesExt {@link DmfMessageConverter} always trust {@link #DMF_JSON_MODEL_PACKAGE}. If any additional packages
+     *         shall be trusted provided here
+     */
+    public DmfMessageConverter(final JsonMapper jsonMapper, final String... trustedPackagesExt) {
+        super(
+                jsonMapper,
+                trustedPackagesExt == null || trustedPackagesExt.length == 0
+                        ? new String[] { DMF_JSON_MODEL_PACKAGE }
+                        : Stream.concat(Stream.of(DMF_JSON_MODEL_PACKAGE), Arrays.stream(trustedPackagesExt))
+                                .distinct()
+                                .toArray(String[]::new));
     }
 
     @Override