diff --git a/image-to-base64.js b/image-to-base64.js
index 1ba3492..32a98d4 100644
--- a/image-to-base64.js
+++ b/image-to-base64.js
@@ -16,7 +16,7 @@ const image2base64 = (url, param) => {
                 )
                 .then(
                     (buffer) => {
-                        return "data:image/jpeg;base64," + window.btoa(
+                        return window.btoa(
                             [].slice.call(
                                 new Uint8Array(buffer)
                             ).map(
diff --git a/index.js b/index.js
index 8761ae9..83676e7 100644
--- a/index.js
+++ b/index.js
@@ -15,12 +15,8 @@ const image2base64 = (param) => {
                 let validTypeImage = new RegExp("(\.(jpg)|\.(png)|\.(jpeg))", "gi");
                 if(validTypeImage.test(param)){
                     
-                    if(fs.statSync(param).isFile()){
-                        resolve(
-                            fs.readFileSync(
-                                path.resolve(param)
-                            ).toString("base64")
-                        );
+                    if(fs.statSync(param).isFile() === true){
+                        resolve(fs.readFileSync(path.resolve(param)).toString("base64"));
                     }else{
                         reject(null);
                     }
@@ -40,9 +36,7 @@ const image2base64 = (param) => {
                 )
                 .then(
                     (body) => {
-                        resolve(
-                            body.toString("base64")
-                        );
+                        resolve(body.toString("base64"));
                     }
                 );
 
diff --git a/test/index.js b/test/index.js
index 07db574..109612c 100644
--- a/test/index.js
+++ b/test/index.js
@@ -15,7 +15,7 @@ describe("must to be resolved the promise", function(){
                 assert(validBase64.test(data), true);
             }
         )
-        .catch((err)=>assert(err, true));
+        .catch((err) => assert(err, true));
     });
     
     it("get image of the path and convert to base64", function(){
@@ -25,7 +25,7 @@ describe("must to be resolved the promise", function(){
                 assert(validBase64.test(data).test(data), true);
             }
         )
-        .catch((err)=>assert(err, true));
+        .catch((err) => assert(err, true));
     });
     
 });
\ No newline at end of file