diff --git a/build.gradle b/build.gradle
index 2708ae7..f6f62f4 100644
--- a/build.gradle
+++ b/build.gradle
@@ -23,7 +23,7 @@ sourceSets {
 }
 dependencies {
     api project (":common")
-    api 'io.netty:netty-tcnative-boringssl-static:2.0.41.Final'
+    api 'io.netty:netty-tcnative-boringssl-static:2.0.46.Final'
     api 'com.google.code.gson:gson:2.8.8'
 
     testImplementation 'junit:junit:4.13.2'
diff --git a/src/main/src/org/bdware/server/CMDConf.java b/src/main/src/org/bdware/server/CMDConf.java
index 4ba8d7e..458362e 100644
--- a/src/main/src/org/bdware/server/CMDConf.java
+++ b/src/main/src/org/bdware/server/CMDConf.java
@@ -1,6 +1,5 @@
 package org.bdware.server;
 
-import com.google.gson.Gson;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 import org.bdware.sc.util.JsonUtil;
@@ -39,7 +38,7 @@ public class CMDConf {
     public String clientToClusterPlugins = "";
     public String tcpPlugins = "";
 
-    public static CMDConf parseConf(String confPath) {
+    public static CMDConf parseFile(String confPath) {
         CMDConf ret = null;
         File conf = new File(confPath);
         if (conf.exists()) {
@@ -49,7 +48,7 @@ public class CMDConf {
                 while (null != (temp = br.readLine())) {
                     sbl.append(temp);
                 }
-                ret = new Gson().fromJson(sbl.toString(), CMDConf.class);
+                ret = JsonUtil.fromJson(sbl.toString(), CMDConf.class);
             } catch (IOException ignored) {
                 LOGGER.warn("parsing configure from file failed!");
             }
diff --git a/src/main/src/org/bdware/server/http/HttpFileHandleAdapter.java b/src/main/src/org/bdware/server/http/HttpFileHandleAdapter.java
index eedf0d9..b3dc875 100644
--- a/src/main/src/org/bdware/server/http/HttpFileHandleAdapter.java
+++ b/src/main/src/org/bdware/server/http/HttpFileHandleAdapter.java
@@ -15,9 +15,8 @@ import java.io.RandomAccessFile;
 import static io.netty.handler.codec.http.HttpVersion.HTTP_1_1;
 
 public class HttpFileHandleAdapter extends SimpleChannelInboundHandler<FullHttpRequest> {
-
-    FileFilter fileFilter;
     private final String location;
+    FileFilter fileFilter;
 
     public HttpFileHandleAdapter(String path, FileFilter fileFilter) {
         location = path;