diff --git a/src/handlers/clientErrorHandler.js b/src/handlers/clientErrorHandler.js
index f21fc99..6edf512 100644
--- a/src/handlers/clientErrorHandler.js
+++ b/src/handlers/clientErrorHandler.js
@@ -7,13 +7,13 @@ const generateServerString = require("../utils/generateServerString.js");
 let serverconsole = {};
 
 function clientErrorHandler(err, socket) {
-  const config = Object.assign(process.serverConfig);
+  const config = Object.assign({}, process.serverConfig);
 
   config.generateServerString = () =>
     generateServerString(config.exposeServerVersion);
 
   // getCustomHeaders() in SVR.JS 3.x
-  config.getCustomHeaders = () => Object.assign(config.customHeaders);
+  config.getCustomHeaders = () => Object.assign({}, config.customHeaders);
 
   // Prevent multiple error handlers from one request
   if (socket.__assigned__) {
@@ -54,7 +54,7 @@ function clientErrorHandler(err, socket) {
       if (code >= 400 && code <= 499) process.err4xxcounter++;
       if (code >= 500 && code <= 599) process.err5xxcounter++;
       let head = "HTTP/1.1 " + code.toString() + " " + name + "\r\n";
-      headers = Object.assign(headers);
+      headers = Object.assign({}, headers);
       headers["Date"] = new Date().toGMTString();
       headers["Connection"] = "close";
       Object.keys(headers).forEach(function (headername) {
diff --git a/src/handlers/noproxyHandler.js b/src/handlers/noproxyHandler.js
index 76e3916..8ab7b46 100644
--- a/src/handlers/noproxyHandler.js
+++ b/src/handlers/noproxyHandler.js
@@ -27,7 +27,7 @@ function noproxyHandler(req, socket, head) {
   socket.on("error", () => {});
 
   // SVR.JS configuration object (modified)
-  const config = Object.assign(process.serverConfig);
+  const config = Object.assign({}, process.serverConfig);
 
   var reqip = socket.remoteAddress;
   var reqport = socket.remotePort;
diff --git a/src/handlers/proxyHandler.js b/src/handlers/proxyHandler.js
index c6a8f04..7b76684 100644
--- a/src/handlers/proxyHandler.js
+++ b/src/handlers/proxyHandler.js
@@ -29,7 +29,7 @@ function proxyHandler(req, socket, head) {
   socket.on("error", () => {});
 
   // SVR.JS configuration object (modified)
-  const config = Object.assign(process.serverConfig);
+  const config = Object.assign({}, process.serverConfig);
 
   config.generateServerString = () => {
     return generateServerString(config.exposeServerVersion);
diff --git a/src/handlers/requestHandler.js b/src/handlers/requestHandler.js
index 04bda74..da48d0c 100644
--- a/src/handlers/requestHandler.js
+++ b/src/handlers/requestHandler.js
@@ -29,7 +29,7 @@ function requestHandler(req, res) {
   };
 
   // SVR.JS configuration object (modified)
-  const config = Object.assign(process.serverConfig);
+  const config = Object.assign({}, process.serverConfig);
 
   config.generateServerString = () => {
     return generateServerString(config.exposeServerVersion);
@@ -37,7 +37,7 @@ function requestHandler(req, res) {
 
   // getCustomHeaders() in SVR.JS 3.x
   config.getCustomHeaders = () => {
-    let ph = Object.assign(config.customHeaders);
+    let ph = Object.assign({}, config.customHeaders);
     if (config.customHeadersVHost) {
       let vhostP = null;
       config.customHeadersVHost.every(function (vhost) {
@@ -52,7 +52,7 @@ function requestHandler(req, res) {
         }
       });
       if (vhostP && vhostP.headers) {
-        const phNu = Object.assign(vhostP.headers);
+        const phNu = Object.assign({}, vhostP.headers);
         Object.keys(phNu).forEach(function (phNuK) {
           ph[phNuK] = phNu[phNuK];
         });
@@ -80,7 +80,7 @@ function requestHandler(req, res) {
       if (typeof b == "object") table = b;
       if (table == undefined) table = this.tHeaders;
       if (table == undefined) table = {};
-      table = Object.assign(table);
+      table = Object.assign({}, table);
       Object.keys(table).forEach(function (key) {
         const al = key.toLowerCase();
         if (
diff --git a/src/utils/clusterBunShim.js b/src/utils/clusterBunShim.js
index 2db690b..c85f3c4 100644
--- a/src/utils/clusterBunShim.js
+++ b/src/utils/clusterBunShim.js
@@ -87,9 +87,9 @@ if (!process.singleThreaded) {
     cluster.workers = {};
     cluster.fork = function (env) {
       const child_process = require("child_process");
-      let newEnvironment = Object.assign(env ? env : process.env);
+      let newEnvironment = Object.assign({}, env ? env : process.env);
       newEnvironment.NODE_UNIQUE_ID = cluster._workersCounter;
-      let newArguments = Object.assign(process.argv);
+      let newArguments = Object.assign({}, process.argv);
       let command = newArguments.shift();
       let newWorker = child_process.spawn(command, newArguments, {
         env: newEnvironment,