diff --git a/package.json b/package.json
index 29db34b..767f9bd 100644
--- a/package.json
+++ b/package.json
@@ -75,7 +75,8 @@
     "axios": "^0.27.0",
     "defu": "^5.0.0",
     "js-cookie": "^3.0.0",
-    "qs": "^6.10.1"
+    "qs": "^6.10.1",
+    "ufo": "^1.2.0"
   },
   "devDependencies": {
     "@commitlint/cli": "17.6.7",
diff --git a/src/lib/strapi.ts b/src/lib/strapi.ts
index a08656d..7f7b223 100644
--- a/src/lib/strapi.ts
+++ b/src/lib/strapi.ts
@@ -9,6 +9,7 @@ import axios, {
 import defu from "defu";
 import qs from "qs";
 import Cookies from "js-cookie";
+import { cleanDoubleSlashes, joinURL } from "ufo";
 
 // Load custom types
 import type {
@@ -60,11 +61,18 @@ export class Strapi {
    */
   constructor(options?: StrapiOptions) {
     // merge given options with default values
-    this.options = defu((options as StrapiDefaultOptions) || {}, defaults);
+    const _options = defu(options || {}, defaults);
+
+    // clean url & prefix
+    this.options = {
+      ..._options,
+      url: cleanDoubleSlashes(_options?.url),
+      prefix: cleanDoubleSlashes(_options?.prefix),
+    };
 
     // create axios instance
     this.axios = axios.create({
-      baseURL: new URL(this.options.prefix, this.options.url).href,
+      baseURL: joinURL(this.options.url, this.options.prefix),
       paramsSerializer: qs.stringify,
       ...this.options.axiosOptions,
     });
@@ -253,7 +261,7 @@ export class Strapi {
    * @returns string
    */
   public getProviderAuthenticationUrl(provider: StrapiAuthProvider): string {
-    return new URL(`/connect/${provider}`, this.options.url).href;
+    return joinURL(this.options.url, this.options.prefix, "connect", provider);
   }
 
   /**
diff --git a/test/lib/strapi.test.ts b/test/lib/strapi.test.ts
index bb69bc3..74de1f2 100644
--- a/test/lib/strapi.test.ts
+++ b/test/lib/strapi.test.ts
@@ -3,6 +3,7 @@ import sinon from "sinon";
 import Cookies from "js-cookie";
 import { StrapiError } from "../../src";
 import { AxiosError } from "axios";
+import { joinURL } from "ufo";
 
 interface TestContext {
   strapi: Strapi;
@@ -273,7 +274,7 @@ describe("Strapi SDK", () => {
       await context.strapi.changePassword({
         currentPassword: "password",
         password: "newPassword",
-        passwordConfirmation: "newPassword"
+        passwordConfirmation: "newPassword",
       });
       expect(
         context.axiosRequest.calledWith({
@@ -282,8 +283,8 @@ describe("Strapi SDK", () => {
           data: {
             currentPassword: "password",
             password: "newPassword",
-            passwordConfirmation: "newPassword"
-          }
+            passwordConfirmation: "newPassword",
+          },
         })
       ).toBe(true);
     });
@@ -356,7 +357,13 @@ describe("Strapi SDK", () => {
     test("Get Authentication Provider", () => {
       const url = context.strapi.getProviderAuthenticationUrl("github");
 
-      expect(url).toBe("http://strapi-host/connect/github");
+      expect(url).toBe(
+        joinURL(
+          context.strapi.options.url,
+          context.strapi.options.prefix,
+          "connect/github"
+        )
+      );
     });
 
     test("Authentication with third party token", async () => {
diff --git a/yarn.lock b/yarn.lock
index 3405a57..768d17c 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -7052,6 +7052,11 @@ typescript@^4.4.3:
   resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.5.4.tgz#a17d3a0263bf5c8723b9c52f43c5084edf13c2e8"
   integrity sha512-VgYs2A2QIRuGphtzFV7aQJduJ2gyfTljngLzjpfW9FoYZF6xuw1W0vW9ghCKLfcWrCFxK81CSGRAvS1pn4fIUg==
 
+ufo@^1.2.0:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/ufo/-/ufo-1.2.0.tgz#28d127a087a46729133fdc89cb1358508b3f80ba"
+  integrity sha512-RsPyTbqORDNDxqAdQPQBpgqhWle1VcTSou/FraClYlHf6TZnQcGslpLcAphNR+sQW4q5lLWLbOsRlh9j24baQg==
+
 uglify-js@^3.1.4:
   version "3.14.5"
   resolved "https://registry.yarnpkg.com/uglify-js/-/uglify-js-3.14.5.tgz#cdabb7d4954231d80cb4a927654c4655e51f4859"