diff --git a/src/main/java/com/alibaba/fastjson/serializer/FieldSerializer.java b/src/main/java/com/alibaba/fastjson/serializer/FieldSerializer.java
index ca18857bd..2a438cfdd 100644
--- a/src/main/java/com/alibaba/fastjson/serializer/FieldSerializer.java
+++ b/src/main/java/com/alibaba/fastjson/serializer/FieldSerializer.java
@@ -23,8 +23,6 @@ import com.alibaba.fastjson.util.TypeUtils;
 
 import java.io.IOException;
 import java.lang.reflect.InvocationTargetException;
-import java.math.BigDecimal;
-import java.math.BigInteger;
 import java.text.SimpleDateFormat;
 import java.util.Collection;