diff --git a/pom.xml b/pom.xml
index 7a8a9b8..8f09872 100644
--- a/pom.xml
+++ b/pom.xml
@@ -6,7 +6,7 @@
 
     <groupId>org.starcoin</groupId>
     <artifactId>sdk</artifactId>
-    <version>1.1.31</version>
+    <version>1.2.1</version>
 
     <name>Starcoin Java SDK</name>
     <description>Starcoin Java SDK</description>
diff --git a/src/main/java/org/starcoin/bean/BlockHeader.java b/src/main/java/org/starcoin/bean/BlockHeader.java
index ba572e6..289a064 100644
--- a/src/main/java/org/starcoin/bean/BlockHeader.java
+++ b/src/main/java/org/starcoin/bean/BlockHeader.java
@@ -20,6 +20,8 @@
 import com.alibaba.fastjson.annotation.JSONType;
 import com.fasterxml.jackson.annotation.JsonProperty;
 
+import java.util.Vector;
+
 @JSONType(naming = PropertyNamingStrategy.SnakeCase)
 public class BlockHeader extends Base {
     long timestamp;
@@ -78,6 +80,10 @@ public class BlockHeader extends Base {
     @JsonProperty("txn_accumulator_root")
     private String txnAccumulatorRoot;
 
+    @JSONField(name = "parents_hash")
+    @JsonProperty("parents_hash")
+    private Vector<String> parentsHash;
+
     public String getAuthor() {
         return author;
     }
@@ -206,6 +212,14 @@ public void setDifficultyHexStr(String difficultyHexStr) {
         this.difficultyHexStr = difficultyHexStr;
     }
 
+    public Vector<String> getParentsHash() {
+        return parentsHash;
+    }
+
+    public void setParentsHash(Vector<String> parentsHash) {
+        this.parentsHash = parentsHash;
+    }
+
     @Override
     public String toString() {
         return "BlockHeader{" +
@@ -225,6 +239,7 @@ public String toString() {
                 ", parentHash='" + parentHash + '\'' +
                 ", stateRoot='" + stateRoot + '\'' +
                 ", txnAccumulatorRoot='" + txnAccumulatorRoot + '\'' +
+                ", parents_hash='" + parentsHash + '\'' +
                 '}';
     }
 }