diff --git a/aws4.js b/aws4.js
index 0cff0f0..baeaee2 100644
--- a/aws4.js
+++ b/aws4.js
@@ -28,6 +28,10 @@ function RequestSigner(request, credentials) {
 
   if (typeof request === 'string') request = url.parse(request)
 
+  request = this.sanitizeHost(request);
+  if (request.headers)
+    request.headers = this.sanitizeHost(request.headers);
+
   var headers = request.headers = (request.headers || {}),
       hostParts = this.matchHost(request.hostname || request.host || headers.Host || headers.host)
 
@@ -56,6 +60,25 @@ function RequestSigner(request, credentials) {
   this.isCodeCommitGit = this.service === 'codecommit' && request.method === 'GIT'
 }
 
+RequestSigner.prototype.sanitizeHost = function(object) {
+  // Object will be headers || request
+  if (object.host) {
+    object.host = this.removeProtocol(object.host);
+  }
+  if (object.Host) {
+   object.Host = this.removeProtocol(object.Host);
+  }
+  if (object.hostname) {
+   object.hostname = this.removeProtocol(object.hostname);
+  }
+
+  return object;
+}
+
+RequestSigner.prototype.removeProtocol = function(url) {
+  return url.replace('http://', '').replace('https://', '');
+}
+
 RequestSigner.prototype.matchHost = function(host) {
   var match = (host || '').match(/([^\.]+)\.(?:([^\.]*)\.)?amazonaws\.com$/)
   var hostParts = (match || []).slice(1, 3)
diff --git a/test/fast.js b/test/fast.js
index fcb2734..72345c0 100644
--- a/test/fast.js
+++ b/test/fast.js
@@ -167,6 +167,13 @@ describe('aws4', function() {
         'SignedHeaders=date;host;x-amz-content-sha256;x-amz-date, ' +
         'Signature=6fda8a58c01edfcb6773c15ad5a276a893ce52978a8f5cd1705fae14df78cfd4')
     })
+    it('should remove protocol from host / hostname', function() {
+      var host = 'sqs.us-east-1.amazonaws.com';
+      var opts = aws4.sign({hostname: 'https://'+host, headers: {Date: date}})
+      opts.headers['Host'].should.equal(host)
+      opts.headers['X-Amz-Date'].should.equal(iso)
+      opts.headers.Authorization.should.equal(auth)
+    })
   })
 
   describe('#sign() with host', function() {
@@ -183,6 +190,13 @@ describe('aws4', function() {
         'SignedHeaders=date;host;x-amz-content-sha256;x-amz-date, ' +
         'Signature=6fda8a58c01edfcb6773c15ad5a276a893ce52978a8f5cd1705fae14df78cfd4')
     })
+    it('should remove protocol from host', function() {
+      var host = 'sqs.us-east-1.amazonaws.com';
+      var opts = aws4.sign({host: 'https://'+host, headers: {Date: date}})
+      opts.headers['Host'].should.equal(host)
+      opts.headers['X-Amz-Date'].should.equal(iso)
+      opts.headers.Authorization.should.equal(auth)
+    })
   })
 
   describe('#sign() with body', function() {