diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8a522c9..9d51bb2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Changelog
 
+## 2.0.1
+
+- Fixed #136: Content-Type header non-overwritable on browser platform
+
 ## 2.0.0
 
 - Feature #103: implement HTTP SSL cert modes
diff --git a/package.json b/package.json
index 7db2343..15e7e91 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "cordova-plugin-advanced-http",
-  "version": "2.0.0",
+  "version": "2.0.1",
   "description": "Cordova / Phonegap plugin for communicating with HTTP servers using SSL pinning",
   "scripts": {
     "updatecert": "node ./scripts/update-test-cert.js",
diff --git a/src/browser/cordova-http-plugin.js b/src/browser/cordova-http-plugin.js
index 5282cec..8fb8292 100644
--- a/src/browser/cordova-http-plugin.js
+++ b/src/browser/cordova-http-plugin.js
@@ -74,9 +74,27 @@ function createXhrFailureObject(xhr) {
   return obj;
 }
 
+function getHeaderValue(headers, headerName) {
+  let result = null;
+
+  Object.keys(headers).forEach(function(key) {
+    if (key.toLowerCase() === headerName.toLowerCase()) {
+      result = headers[key];
+    }
+  });
+
+  return result;
+}
+
+function setDefaultContentType(headers, contentType) {
+  if (getHeaderValue(headers, 'Content-Type') === null) {
+    headers['Content-Type'] = contentType;
+  }
+}
+
 function setHeaders(xhr, headers) {
   Object.keys(headers).forEach(function(key) {
-    if (key === 'Cookie') return;
+    if (key.toLowerCase() === 'cookie') return;
 
     xhr.setRequestHeader(key, headers[key]);
   });
@@ -101,7 +119,7 @@ function sendRequest(method, withData, opts, success, failure) {
 
   switch (serializer) {
     case 'json':
-      xhr.setRequestHeader('Content-Type', 'application/json; charset=utf8');
+      setDefaultContentType(headers, 'application/json; charset=utf8');
       processedData = serializeJsonData(data);
 
       if (processedData === null) {
@@ -111,12 +129,12 @@ function sendRequest(method, withData, opts, success, failure) {
       break;
 
     case 'utf8':
-      xhr.setRequestHeader('Content-Type', 'text/plain; charset=utf8');
+      setDefaultContentType(headers, 'text/plain; charset=utf8');
       processedData = data.text;
       break;
 
     case 'urlencoded':
-      xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
+      setDefaultContentType(headers, 'application/x-www-form-urlencoded');
       processedData = serializeParams(data);
       break;
   }
@@ -166,11 +184,8 @@ var browserInterface = {
   downloadFile: function (success, failure, opts) {
     return failure('advanced-http: function "downloadFile" not supported on browser platform');
   },
-  enableSSLPinning: function (success, failure, opts) {
-    return failure('advanced-http: function "enableSSLPinning" not supported on browser platform');
-  },
-  acceptAllCerts: function (success, failure, opts) {
-    return failure('advanced-http: function "acceptAllCerts" not supported on browser platform');
+  setSSLCertMode: function (success, failure, opts) {
+    return failure('advanced-http: function "setSSLCertMode" not supported on browser platform');
   },
   disableRedirect: function (success, failure, opts) {
     return failure('advanced-http: function "disableRedirect" not supported on browser platform');