diff --git a/lib/Client.js b/lib/Client.js
index 73199ae..3ab1ce3 100644
--- a/lib/Client.js
+++ b/lib/Client.js
@@ -42,9 +42,9 @@ function req(method, params) {
         console.log('✓ ' + method + ' succeeded.');
         var resp = (0, _Utils.tryJson)(body);
         if (rest.keepCookie) {
-          var cookie = j.getCookieString(url);
+          var __cookie = j.getCookieString(url);
           resolve(_extends({
-            cookie: cookie
+            __cookie: __cookie
           }, resp));
         } else {
           resolve(resp);
diff --git a/src/Client.js b/src/Client.js
index 511af1c..688bad9 100644
--- a/src/Client.js
+++ b/src/Client.js
@@ -22,9 +22,9 @@ export function req( method, params ) {
         console.log(`✓ ${method} succeeded.`);
         const resp = tryJson(body);
         if(rest.keepCookie) {
-          const cookie = j.getCookieString(url);
+          const __cookie = j.getCookieString(url);
           resolve({
-            cookie,
+            __cookie,
             ...resp
           });
         } else {