diff --git a/samples/client/petstore/java/default/src/main/java/io/swagger/client/model/Pet.java b/samples/client/petstore/java/default/src/main/java/io/swagger/client/model/Pet.java
index 7ab51aa9adb..9d183a547a5 100644
--- a/samples/client/petstore/java/default/src/main/java/io/swagger/client/model/Pet.java
+++ b/samples/client/petstore/java/default/src/main/java/io/swagger/client/model/Pet.java
@@ -6,7 +6,6 @@ import com.fasterxml.jackson.annotation.JsonValue;
 import io.swagger.annotations.ApiModel;
 import io.swagger.annotations.ApiModelProperty;
 import io.swagger.client.model.Category;
-import java.util.*;
 import io.swagger.client.model.Tag;
 import java.util.ArrayList;
 import java.util.List;