diff --git a/banks/bradesco/index.js b/banks/bradesco/index.js
index 944e8e4..e97899b 100644
--- a/banks/bradesco/index.js
+++ b/banks/bradesco/index.js
@@ -9,7 +9,7 @@ exports.options = {
 
 exports.dvBarra = function (barra) {
   var resto2 = formatters.mod11(barra, 9, 1)
-  return (resto2 == 0 || resto2 == 1 || resto2 == 10) ? 1 : 11 - resto2
+  return (resto2 === 0 || resto2 === 1 || resto2 === 10) ? 1 : 11 - resto2
 }
 
 exports.barcodeData = function (boleto) {
@@ -94,10 +94,10 @@ exports.parseEDIFile = function (fileContent) {
       var line = lines[i]
       var registro = line.substring(0, 1)
 
-      if (registro == '0') {
+      if (registro === '0') {
         parsedFile['razao_social'] = line.substring(46, 76)
         parsedFile['data_arquivo'] = ediHelper.dateFromEdiDate(line.substring(94, 100))
-      } else if (registro == '1') {
+      } else if (registro === '1') {
         var boleto = {}
 
         parsedFile['cnpj'] = formatters.removeTrailingZeros(line.substring(3, 17))
@@ -109,13 +109,13 @@ exports.parseEDIFile = function (fileContent) {
 
         var ocorrenciasStr = line.substring(318, 328)
         var motivosOcorrencia = []
-        var isPaid = (parseInt(boleto['valor_pago']) >= parseInt(boleto['valor']) || boleto['codigo_ocorrencia'] == '06')
+        var isPaid = (parseInt(boleto['valor_pago']) >= parseInt(boleto['valor']) || boleto['codigo_ocorrencia'] === '06')
 
         for (var j = 0; j < ocorrenciasStr.length; j += 2) {
           var ocorrencia = ocorrenciasStr.substr(j, 2)
           motivosOcorrencia.push(ocorrencia)
 
-          if (ocorrencia != '00') {
+          if (ocorrencia !== '00') {
             isPaid = false
           }
         }
diff --git a/banks/santander/index.js b/banks/santander/index.js
index 59c68af..c5cdc1d 100644
--- a/banks/santander/index.js
+++ b/banks/santander/index.js
@@ -10,7 +10,7 @@ exports.options = {
 
 exports.dvBarra = function (barra) {
   var resto2 = formatters.mod11(barra, 9, 1)
-  return (resto2 == 0 || resto2 == 1 || resto2 == 10) ? 1 : 11 - resto2
+  return (resto2 === 0 || resto2 === 1 || resto2 === 10) ? 1 : 11 - resto2
 }
 
 exports.barcodeData = function (boleto) {
@@ -99,16 +99,16 @@ exports.parseEDIFile = function (fileContent) {
       var line = lines[i]
       var registro = line.substring(7, 8)
 
-      if (registro == '0') {
+      if (registro === '0') {
         parsedFile['cnpj'] = line.substring(17, 32)
         parsedFile['razao_social'] = line.substring(72, 102)
         parsedFile['agencia_cedente'] = line.substring(32, 36)
         parsedFile['conta_cedente'] = line.substring(37, 47)
         parsedFile['data_arquivo'] = helper.dateFromEdiDate(line.substring(143, 152))
-      } else if (registro == '3') {
+      } else if (registro === '3') {
         var segmento = line.substring(13, 14)
 
-        if (segmento == 'T') {
+        if (segmento === 'T') {
           var boleto = {}
 
           boleto['codigo_ocorrencia'] = line.substring(15, 17)
@@ -120,11 +120,11 @@ exports.parseEDIFile = function (fileContent) {
 
           currentNossoNumero = formatters.removeTrailingZeros(line.substring(40, 52))
           parsedFile.boletos[currentNossoNumero] = boleto
-        } else if (segmento == 'U') {
+        } else if (segmento === 'U') {
           parsedFile.boletos[currentNossoNumero]['valor_pago'] = formatters.removeTrailingZeros(line.substring(77, 92))
 
           var paid = parsedFile.boletos[currentNossoNumero]['valor_pago'] >= parsedFile.boletos[currentNossoNumero]['valor']
-          paid = paid && parsedFile.boletos[currentNossoNumero]['codigo_ocorrencia'] == '17'
+          paid = paid && parsedFile.boletos[currentNossoNumero]['codigo_ocorrencia'] === '17'
 
           boleto = parsedFile.boletos[currentNossoNumero]
 
diff --git a/lib/boleto.js b/lib/boleto.js
index 5eb2b53..5c74c60 100644
--- a/lib/boleto.js
+++ b/lib/boleto.js
@@ -12,7 +12,7 @@ var hashString = function (string) {
   var chr
   var len
 
-  if (string.length == 0) return hash
+  if (string.length === 0) return hash
   for (i = 0, len = string.length; i < len; i++) {
     chr = string.charCodeAt(i)
     hash = ((hash << 5) - hash) + chr
@@ -80,9 +80,9 @@ Boleto.prototype.renderHTML = function (callback) {
   renderOptions['barcode_render_engine'] = Boleto.barcodeRenderEngine
   renderOptions['barcode_height'] = '50'
 
-  if (Boleto.barcodeRenderEngine == 'bmp') {
+  if (Boleto.barcodeRenderEngine === 'bmp') {
     renderOptions['barcode_data'] = barcode.bmpLineForBarcodeData(self['barcode_data'])
-  } else if (Boleto.barcodeRenderEngine == 'img') {
+  } else if (Boleto.barcodeRenderEngine === 'img') {
     renderOptions['barcode_data'] = barcode.binaryRepresentationForBarcodeData(self['barcode_data'])
   }
 
diff --git a/lib/formatters.js b/lib/formatters.js
index 62286a9..a967a01 100644
--- a/lib/formatters.js
+++ b/lib/formatters.js
@@ -23,7 +23,7 @@ exports.formatAmount = function (amount) {
   var newIntegers = ''
 
   for (var i = 0; i < integers.length; i++) {
-    if (i > 0 && (integers.length - i) % 3 == 0) newIntegers += '.'
+    if (i > 0 && (integers.length - i) % 3 === 0) newIntegers += '.'
     newIntegers += integers[i]
   }
 
@@ -45,18 +45,18 @@ exports.mod11 = function (num, base, r) {
     var parcial = parseInt(num[i]) * fator
     soma += parcial
 
-    if (fator == base) {
+    if (fator === base) {
       fator = 1
     }
 
     fator++
   }
 
-  if (r == 0) {
+  if (r === 0) {
     soma *= 10
     var digito = soma % 11
-    return digito == 10 ? 0 : digito
-  } else if (r == 1) {
+    return digito === 10 ? 0 : digito
+  } else if (r === 1) {
     return soma % 11
   }
 }
@@ -72,11 +72,11 @@ exports.mod10 = function (num) {
       tempSum += parseInt(temp[j])
     }
     total += tempSum
-    fator = (fator == 2) ? 1 : 2
+    fator = (fator === 2) ? 1 : 2
   }
 
   var resto = total % 10
-  return (resto == 0) ? 0 : (10 - resto)
+  return (resto === 0) ? 0 : (10 - resto)
 }
 
 exports.fatorVencimento = function (date) {
@@ -90,7 +90,7 @@ exports.dateFromEdiDate = function (ediDate) {
 }
 
 exports.removeTrailingZeros = function (string) {
-  while (string.charAt(0) == '0') {
+  while (string.charAt(0) === '0') {
     string = string.substring(1, string.length)
   }