diff --git a/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/entpay/EntPayRedpackRequest.java b/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/entpay/EntPayRedpackRequest.java
index 762499e69..7f78e66b2 100644
--- a/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/entpay/EntPayRedpackRequest.java
+++ b/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/entpay/EntPayRedpackRequest.java
@@ -148,6 +148,11 @@ public class EntPayRedpackRequest extends BaseWxPayRequest {
     return true;
   }
 
+  @Override
+  protected String[] getIgnoredParamsForSign() {
+    return new String[]{"sign_type"};
+  }
+
   @Override
   protected void storeMap(Map<String, String> map) {
     map.put("mch_billno", mchBillNo);