diff --git a/mattermost.el b/mattermost.el
index c59e25c..e0993cc 100644
--- a/mattermost.el
+++ b/mattermost.el
@@ -40,7 +40,7 @@
 (defun mattermost-login (username password)
   "Log into the Mattermost Server"
   (let ((url-request-method "POST")
-        (url-request-extra-headers `(("Content-Type" . "application/json")))
+        (url-request-extra-headers '(("Content-Type" . "application/json")))
         (url-request-data (json-serialize (list :login_id username :password password))))
     (with-current-buffer (url-retrieve-synchronously (concat mattermost-server-url "/api/v4/users/login"))
       (beginning-of-buffer)
@@ -59,7 +59,7 @@
         (url-request-extra-headers `(("Content-Type" . "application/json")))
         (url-request-data (if body (json-serialize body))))
     (if mattermost-token
-        (add-to-list 'url-request-extra-headers (cons "Authorization" (concat "Bearer " mattermost-token))))
+        (add-to-list 'url-request-extra-headers `("Authorization" . ,(concat "Bearer " mattermost-token))))
     (with-current-buffer (url-retrieve-synchronously (concat mattermost-server-url "/api/v4" url) t)
       (mattermost-parse-json))))