diff --git a/docs/agents.md b/docs/agents.md
index 7a53305..b9bbf4a 100644
--- a/docs/agents.md
+++ b/docs/agents.md
@@ -36,7 +36,7 @@ export const test: CustomHttpAgent = {
 };
 
 // Note: push it to the package agents list
-agents.push(test);
+agents.add(test);
 ```
 
 The **agent** property is an Undici Agent.
diff --git a/examples/agent.mjs b/examples/agent.mjs
index 358c0b4..e62a9b8 100644
--- a/examples/agent.mjs
+++ b/examples/agent.mjs
@@ -15,7 +15,7 @@ const yoda = {
   preprod: "",
   dev: "https://yoda.myunisoft.fr:1407"
 };
-httpie.agents.push(yoda);
+httpie.agents.add(yoda);
 
 const { data } = await httpie.get("/yoda/api/v1/ipa/healthz");
 console.log(data);
diff --git a/package-lock.json b/package-lock.json
index bb475ce..f0a9239 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "@myunisoft/httpie",
-  "version": "1.0.0",
+  "version": "1.1.0",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "@myunisoft/httpie",
-      "version": "1.0.0",
+      "version": "1.1.0",
       "license": "MIT",
       "dependencies": {
         "content-type": "^1.0.4",
@@ -16,6 +16,7 @@
       },
       "devDependencies": {
         "@myunisoft/eslint-config": "^1.3.2",
+        "@slimio/is": "^1.5.1",
         "@types/content-type": "^1.1.5",
         "@types/jest": "^26.0.24",
         "@types/lru-cache": "^5.1.1",
@@ -1027,6 +1028,15 @@
         "@sinonjs/commons": "^1.7.0"
       }
     },
+    "node_modules/@slimio/is": {
+      "version": "1.5.1",
+      "resolved": "https://registry.npmjs.org/@slimio/is/-/is-1.5.1.tgz",
+      "integrity": "sha512-xQ0AgodIE8nHYy508AVmpxqnIr/Ytyz5Xm7I6NQU33+RvDzs94T9c0dTnUWuariByLr1geXXe6kMaTM9TcOIEA==",
+      "dev": true,
+      "engines": {
+        "node": ">=10"
+      }
+    },
     "node_modules/@tootallnate/once": {
       "version": "1.1.2",
       "resolved": "https://registry.npmjs.org/@tootallnate/once/-/once-1.1.2.tgz",
@@ -6660,6 +6670,12 @@
         "@sinonjs/commons": "^1.7.0"
       }
     },
+    "@slimio/is": {
+      "version": "1.5.1",
+      "resolved": "https://registry.npmjs.org/@slimio/is/-/is-1.5.1.tgz",
+      "integrity": "sha512-xQ0AgodIE8nHYy508AVmpxqnIr/Ytyz5Xm7I6NQU33+RvDzs94T9c0dTnUWuariByLr1geXXe6kMaTM9TcOIEA==",
+      "dev": true
+    },
     "@tootallnate/once": {
       "version": "1.1.2",
       "resolved": "https://registry.npmjs.org/@tootallnate/once/-/once-1.1.2.tgz",
diff --git a/package.json b/package.json
index 200fc25..e66c83c 100644
--- a/package.json
+++ b/package.json
@@ -31,6 +31,7 @@
   "homepage": "https://github.com/MyUnisoft/httpie#readme",
   "devDependencies": {
     "@myunisoft/eslint-config": "^1.3.2",
+    "@slimio/is": "^1.5.1",
     "@types/content-type": "^1.1.5",
     "@types/jest": "^26.0.24",
     "@types/lru-cache": "^5.1.1",
diff --git a/src/agents.ts b/src/agents.ts
index 3635a4a..435584c 100644
--- a/src/agents.ts
+++ b/src/agents.ts
@@ -36,7 +36,7 @@ export interface CustomHttpAgent {
   limit?: InlineCallbackAction;
 }
 
-export const agents: CustomHttpAgent[] = [];
+export const agents: Set<CustomHttpAgent> = new Set();
 
 /**
  * @description Detect if a given string URI is matching a given Agent custom path.
diff --git a/test/agents.spec.ts b/test/agents.spec.ts
index 8271580..29840bf 100644
--- a/test/agents.spec.ts
+++ b/test/agents.spec.ts
@@ -1,3 +1,6 @@
+// Import Third-party Dependencies
+import is from "@slimio/is";
+
 // Import Internal Dependencies
 import { windev } from "./helpers";
 import * as Agents from "../src/agents";
@@ -7,7 +10,8 @@ const kWindevMonitoringURL = "https://ws-dev.myunisoft.fr/ws_monitoring";
 
 describe("agents", () => {
   it("should be an Array of CustomHttpAgent and must remain extensible", () => {
-    expect(Array.isArray(Agents.agents)).toStrictEqual(true);
+    expect(is.set(Agents.agents)).toStrictEqual(true);
+
     expect(Object.isExtensible(Agents.agents)).toStrictEqual(true);
   });
 });
diff --git a/test/helpers.ts b/test/helpers.ts
index 6ef7802..656304c 100644
--- a/test/helpers.ts
+++ b/test/helpers.ts
@@ -16,6 +16,6 @@ const windev: CustomHttpAgent = {
   preprod: "https://ws-dev.myunisoft.fr",
   dev: "https://ws-dev.myunisoft.fr"
 };
-agents.push(windev);
+agents.add(windev);
 
 export { windev };
diff --git a/test/server/index.ts b/test/server/index.ts
index 0228e93..68dbb56 100644
--- a/test/server/index.ts
+++ b/test/server/index.ts
@@ -39,7 +39,7 @@ export async function createServer(customPath = "local", port = 3000) {
     preprod: `http://localhost:${port}/`,
     dev: `http://localhost:${port}/`
   };
-  agents.push(serverAgent);
+  agents.add(serverAgent);
 
   server.get("/", async() => {
     return {