diff --git a/lib/cookie/index.js b/lib/cookie/index.js
index 2fe9907..3cda489 100644
--- a/lib/cookie/index.js
+++ b/lib/cookie/index.js
@@ -28,7 +28,7 @@ var Cookie = exports = module.exports = function Cookie(str, req) {
   // Map the key/val pairs
   str.split(/ *; */).reduce(function(obj, pair){
     pair = pair.split(/ *= */);
-    obj[pair[0]] = pair[1] || true;
+    obj[pair[0].toLowerCase()] = pair[1] || true;
     return obj;
   }, this);