diff --git a/src/handlers/clientErrorHandler.js b/src/handlers/clientErrorHandler.js
index ff7e5ca..a3d8f90 100644
--- a/src/handlers/clientErrorHandler.js
+++ b/src/handlers/clientErrorHandler.js
@@ -15,7 +15,7 @@ function clientErrorHandler(err, socket) {
     generateServerString(config.exposeServerVersion);
 
   // getCustomHeaders() in SVR.JS 3.x
-  config.getCustomHeaders = () => deepClone(config.customHeaders);
+  config.getCustomHeaders = () => Object.assign({}, config.customHeaders);
 
   // Prevent multiple error handlers from one request
   if (socket.__assigned__) {
diff --git a/src/handlers/requestHandler.js b/src/handlers/requestHandler.js
index ffef689..4dca787 100644
--- a/src/handlers/requestHandler.js
+++ b/src/handlers/requestHandler.js
@@ -40,7 +40,7 @@ function requestHandler(req, res) {
 
   // getCustomHeaders() in SVR.JS 3.x
   config.getCustomHeaders = () => {
-    let ph = deepClone(config.customHeaders);
+    let ph = Object.assign({}, config.customHeaders);
     if (config.customHeadersVHost) {
       let vhostP = null;
       config.customHeadersVHost.every((vhost) => {