diff --git a/.travis.yml b/.travis.yml
index 9842ff8..d1b90db 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,4 +1,4 @@
 language: node_js
-sudo: false
 node_js:
     - "4"
+    - "6"
diff --git a/History.md b/History.md
index e765e2d..ff31226 100644
--- a/History.md
+++ b/History.md
@@ -1,5 +1,6 @@
 # UNRELEASED
 
+* fix host header transform
 * update request dependency
 
 # 1.8.1 (2016-01-20)
diff --git a/lib/HeaderHostTransformer.js b/lib/HeaderHostTransformer.js
index 484b836..f0eccdb 100644
--- a/lib/HeaderHostTransformer.js
+++ b/lib/HeaderHostTransformer.js
@@ -24,7 +24,7 @@ HeaderHostTransformer.prototype._transform = function (chunk, enc, cb) {
     // we just become a regular passthrough
     if (!self.replaced) {
         chunk = chunk.toString();
-        self.push(chunk.replace(/(\r\nHost: )\S+/, function(match, $1) {
+        self.push(chunk.replace(/(\r\n[Hh]ost: )\S+/, function(match, $1) {
             self.replaced = true;
             return $1 + self.host;
         }));