diff --git a/lib/https.js b/lib/https.js
index 6be488aa753..dcf02e4ca20 100644
--- a/lib/https.js
+++ b/lib/https.js
@@ -489,7 +489,7 @@ function Agent(options) {
   if (!(this instanceof Agent))
     return new Agent(options);
 
-  options = { __proto__: null, ...options };
+  options = ObjectSetPrototypeOf({ ...options }, null);
   validateOpenSSLEngineOptions(options);
   options.defaultPort ??= 443;
   options.protocol ??= 'https:';
diff --git a/lib/internal/http/agent.js b/lib/internal/http/agent.js
index 3871c5b56a2..7260b6c9d30 100644
--- a/lib/internal/http/agent.js
+++ b/lib/internal/http/agent.js
@@ -158,7 +158,7 @@ function Agent(options) {
 
   EventEmitter.call(this);
 
-  this.options = { __proto__: null, ...options };
+  this.options = ObjectSetPrototypeOf({ ...options }, null);
 
   this.defaultPort = this.options.defaultPort || 80;
   this.protocol = this.options.protocol || 'http:';
@@ -375,7 +375,7 @@ Agent.prototype.addRequest = function addRequest(req, options, port/* legacy */,
   }
 
   // Here the agent options will override per-request options.
-  options = { __proto__: null, ...options, ...this.options };
+  options = ObjectSetPrototypeOf({ ...options, ...this.options }, null);
   if (options.socketPath)
     options.path = options.socketPath;
 
@@ -445,7 +445,7 @@ Agent.prototype.addRequest = function addRequest(req, options, port/* legacy */,
 
 Agent.prototype.createSocket = function createSocket(req, options, cb) {
   // Here the agent options will override per-request options.
-  options = { __proto__: null, ...options, ...this.options };
+  options = ObjectSetPrototypeOf({ ...options, ...this.options }, null);
   if (options.socketPath)
     options.path = options.socketPath;
 
diff --git a/lib/internal/http/client.js b/lib/internal/http/client.js
index 1952e7b69af..27f00cf9b3f 100644
--- a/lib/internal/http/client.js
+++ b/lib/internal/http/client.js
@@ -26,7 +26,6 @@ const {
   Boolean,
   Error,
   NumberIsFinite,
-  ObjectAssign,
   ObjectDefineProperty,
   ObjectHasOwn,
   ObjectKeys,
@@ -363,7 +362,8 @@ function ClientRequest(input, options, cb) {
       pathIsFromURL = false;
     }
 
-    options = ObjectAssign({ __proto__: null }, input, options);
+    // Avoid creating a dictionary-mode object.
+    options = ObjectSetPrototypeOf({ ...input, ...options }, null);
   }
 
   // Propagate the user's highWaterMark to OutgoingMessage so that
@@ -411,7 +411,7 @@ function ClientRequest(input, options, cb) {
   const defaultPort = options.defaultPort ||
                     (this.agent?.defaultPort);
 
-  const optsWithoutSignal = { __proto__: null, ...options };
+  const optsWithoutSignal = ObjectSetPrototypeOf({ ...options }, null);
 
   const port = optsWithoutSignal.port = options.port || defaultPort || 80;
   const host = optsWithoutSignal.host = validateHost(options.hostname, 'hostname') ||