diff --git a/src/main/java/org/jetlinks/protocol/official/ObjectMappers.java b/src/main/java/org/jetlinks/protocol/official/ObjectMappers.java
index 006fdc9..d8240af 100644
--- a/src/main/java/org/jetlinks/protocol/official/ObjectMappers.java
+++ b/src/main/java/org/jetlinks/protocol/official/ObjectMappers.java
@@ -1,7 +1,9 @@
 package org.jetlinks.protocol.official;
 
+import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.databind.DeserializationFeature;
 import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.SerializationFeature;
 import org.springframework.http.converter.json.Jackson2ObjectMapperBuilder;
 
 public class ObjectMappers {
@@ -13,11 +15,14 @@ public class ObjectMappers {
         JSON_MAPPER = Jackson2ObjectMapperBuilder
                 .json()
                 .build()
-                .configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
+                .configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false)
+                .setSerializationInclusion(JsonInclude.Include.NON_NULL)
+        ;
         CBOR_MAPPER = Jackson2ObjectMapperBuilder
                 .cbor()
                 .build()
-                .configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
+                .configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false)
+                .setSerializationInclusion(JsonInclude.Include.NON_NULL);
     }
 
 }