diff --git a/application/src/main/java/org/thingsboard/server/service/state/DefaultDeviceStateService.java b/application/src/main/java/org/thingsboard/server/service/state/DefaultDeviceStateService.java
index ebdef1f54c..0772dd907b 100644
--- a/application/src/main/java/org/thingsboard/server/service/state/DefaultDeviceStateService.java
+++ b/application/src/main/java/org/thingsboard/server/service/state/DefaultDeviceStateService.java
@@ -15,7 +15,6 @@
  */
 package org.thingsboard.server.service.state;
 
-import com.fasterxml.jackson.databind.ObjectMapper;
 import com.fasterxml.jackson.databind.node.ObjectNode;
 import com.google.common.base.Function;
 import com.google.common.util.concurrent.FutureCallback;