diff --git a/webmagic-core/src/main/java/us/codecraft/webmagic/Site.java b/webmagic-core/src/main/java/us/codecraft/webmagic/Site.java
index bf603b3..edbf934 100644
--- a/webmagic-core/src/main/java/us/codecraft/webmagic/Site.java
+++ b/webmagic-core/src/main/java/us/codecraft/webmagic/Site.java
@@ -1,9 +1,13 @@
 package us.codecraft.webmagic;
 
-import com.sun.org.apache.regexp.internal.RE;
-import us.codecraft.webmagic.utils.HttpConstant;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.LinkedHashMap;
+import java.util.Map;
+import java.util.Set;
+import java.util.UUID;
 
-import java.util.*;
+import us.codecraft.webmagic.utils.HttpConstant;
 
 /**
  * Object contains setting for crawler.<br>
diff --git a/webmagic-core/src/main/java/us/codecraft/webmagic/proxy/Proxy.java b/webmagic-core/src/main/java/us/codecraft/webmagic/proxy/Proxy.java
index ffae4be..878f8ae 100644
--- a/webmagic-core/src/main/java/us/codecraft/webmagic/proxy/Proxy.java
+++ b/webmagic-core/src/main/java/us/codecraft/webmagic/proxy/Proxy.java
@@ -6,7 +6,6 @@ import java.net.URISyntaxException;
 import java.net.URLEncoder;
 import java.nio.charset.StandardCharsets;
 
-import jdk.nashorn.internal.ir.annotations.Immutable;
 import org.apache.commons.lang3.StringUtils;
 import org.apache.http.annotation.Contract;
 import org.apache.http.annotation.ThreadingBehavior;