diff --git a/.nvmrc b/.nvmrc
new file mode 100644
index 0000000..2bd5a0a
--- /dev/null
+++ b/.nvmrc
@@ -0,0 +1 @@
+22
diff --git a/src/index.js b/src/index.js
index 58e9821..2a192fa 100644
--- a/src/index.js
+++ b/src/index.js
@@ -31,7 +31,7 @@ export default class Isbn {
   /**
    * @type {Providers}
    */
-  #providers = DEFAULT_PROVIDERS;
+  providers = DEFAULT_PROVIDERS;
 
   constructor() {
     this.PROVIDER_NAMES = PROVIDER_NAMES;
@@ -62,7 +62,7 @@ export default class Isbn {
       );
     }
 
-    this.#providers = [...new Set(providers)];
+    this.providers = [...new Set(providers)];
     return this;
   }
 
@@ -75,7 +75,7 @@ export default class Isbn {
    */
   async resolve(isbn, options = {}) {
     const messages = [];
-    for (const provider of this.#providers) {
+    for (const provider of this.providers) {
       try {
         return await PROVIDER_RESOLVERS[provider](isbn, options);
       } catch (error) {
diff --git a/types/index.d.ts b/types/index.d.ts
index 18a95b5..2460487 100644
--- a/types/index.d.ts
+++ b/types/index.d.ts
@@ -20,6 +20,10 @@
  * @typedef {import('axios').AxiosRequestConfig} AxiosRequestConfig
  */
 export default class Isbn {
+    /**
+     * @type {Providers}
+     */
+    providers: Providers;
     PROVIDER_NAMES: {
         GOOGLE: string;
         OPENLIBRARY: string;
@@ -41,7 +45,6 @@ export default class Isbn {
      * @throws {Error} - If an error occurs while resolving the book information.
      */
     resolve(isbn: string, options?: AxiosRequestConfig): Promise<Book>;
-    #private;
 }
 export type Book = {
     /**
diff --git a/types/index.d.ts.map b/types/index.d.ts.map
index 02e0810..3b58564 100644
--- a/types/index.d.ts.map
+++ b/types/index.d.ts.map
@@ -1 +1 @@
-{"version":3,"file":"index.d.ts","sourceRoot":"","sources":["../src/index.js"],"names":[],"mappings":"AAMA;;;;;;;;;;;;;;;;GAgBG;AAEH;;;GAGG;AAEH;IAOI;;;;MAAoC;IAGtC;;;;;;OAMG;IACH,oBALW,MAAM,EAAE,GACN,MAAM,CAwBlB;IAED;;;;;;OAMG;IACH,cALW,MAAM,YACN,kBAAkB,GAChB,OAAO,CAAC,IAAI,CAAC,CAkBzB;;CACF;;;;;UAnFa,MAAM;;;;WACN,MAAM;;;;aACN,MAAM,EAAE;;;;iBACR,MAAM;;;;;;;;YAEN,MAAM;;;;gBACN,MAAM,EAAE;;;;eACR,MAAM;;;;mBACN,MAAM;;;;eACN,MAAM,GAAG,SAAS;;;;gBAClB,MAAM,GAAG,SAAS;;;;;;;;kBAElB,MAAM;;;;;;wBAKP,OAAO,yBAAyB,EAAE,SAAS;iCAC3C,OAAO,OAAO,EAAE,kBAAkB"}
\ No newline at end of file
+{"version":3,"file":"index.d.ts","sourceRoot":"","sources":["../src/index.js"],"names":[],"mappings":"AAMA;;;;;;;;;;;;;;;;GAgBG;AAEH;;;GAGG;AAEH;IACE;;OAEG;IACH,WAFU,SAAS,CAEW;IAG5B;;;;MAAoC;IAGtC;;;;;;OAMG;IACH,oBALW,MAAM,EAAE,GACN,MAAM,CAwBlB;IAED;;;;;;OAMG;IACH,cALW,MAAM,YACN,kBAAkB,GAChB,OAAO,CAAC,IAAI,CAAC,CAkBzB;CACF;;;;;UAnFa,MAAM;;;;WACN,MAAM;;;;aACN,MAAM,EAAE;;;;iBACR,MAAM;;;;;;;;YAEN,MAAM;;;;gBACN,MAAM,EAAE;;;;eACR,MAAM;;;;mBACN,MAAM;;;;eACN,MAAM,GAAG,SAAS;;;;gBAClB,MAAM,GAAG,SAAS;;;;;;;;kBAElB,MAAM;;;;;;wBAKP,OAAO,yBAAyB,EAAE,SAAS;iCAC3C,OAAO,OAAO,EAAE,kBAAkB"}
\ No newline at end of file