diff --git a/package-lock.json b/package-lock.json
index f113679..ed0b410 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "lhisp-oauth-client",
-  "version": "1.0.16",
+  "version": "1.0.17",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "lhisp-oauth-client",
-      "version": "1.0.16",
+      "version": "1.0.17",
       "license": "MIT",
       "dependencies": {
         "axios": "^1.4.0",
diff --git a/package.json b/package.json
index 0fcac67..9115487 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lhisp-oauth-client",
-  "version": "1.0.16",
+  "version": "1.0.17",
   "main": "src/index",
   "types": "src/index.d.ts",
   "repository": "git@bitbucket.org:leandro_costa/lhisp-oauth-client.git",
diff --git a/src/lhisp-oauth-client.ts b/src/lhisp-oauth-client.ts
index a8920e1..213d8b4 100644
--- a/src/lhisp-oauth-client.ts
+++ b/src/lhisp-oauth-client.ts
@@ -21,7 +21,7 @@ export class LhispOauthClient<iAccessToken extends AccessToken = AccessToken> {
   protected authHeaderName: string;
   protected tokenHeaderName: string;
   protected authContentType: ContentType;
-  protected certificado?: string;
+  protected certificado?: string | Buffer;
   protected senhaCertificado?: string;
   protected authScope?: string;
   protected headers?: Headers;
@@ -36,7 +36,7 @@ export class LhispOauthClient<iAccessToken extends AccessToken = AccessToken> {
   constructor(params: LhispOauthClientConstructorParams) {
     if (params.certificado) {
       this.agent = new https.Agent({
-        pfx: params.certificado,
+        pfx: Buffer.isBuffer(params.certificado) ? params.certificado : Buffer.from(params.certificado, "base64"),
         passphrase: params.senhaCertificado,
         rejectUnauthorized: false,
       });