diff --git a/lib/sign-up.js b/lib/sign-up.js
index 8842249..993c6cb 100644
--- a/lib/sign-up.js
+++ b/lib/sign-up.js
@@ -23,6 +23,8 @@ function signUp (state, options) {
     return Promise.reject(new Error('SignUp with profile data not yet implemented. Please see https://github.com/hoodiehq/hoodie-account-client/issues/11.'))
   }
 
+  options.createdAt = get(state, 'account.createdAt')
+
   return internals.request({
     url: state.url + '/session/account',
     method: 'PUT',
diff --git a/utils/get-state.js b/utils/get-state.js
index 7924d6c..7db7693 100644
--- a/utils/get-state.js
+++ b/utils/get-state.js
@@ -40,7 +40,8 @@ function getState (options) {
 
   if (!state.account) {
     state.account = {
-      id: options.id || generateId()
+      id: options.id || generateId(),
+      createdAt: new Date().toISOString()
     }
 
     saveAccount({