diff --git a/tarteaucitron.js b/tarteaucitron.js
index f9c8827..4376bea 100644
--- a/tarteaucitron.js
+++ b/tarteaucitron.js
@@ -1227,10 +1227,11 @@ var tarteaucitron = {
                 regex = new RegExp("!" + key + "=(wait|true|false)", "g"),
                 cookie = tarteaucitron.cookie.read().replace(regex, ""),
                 value = tarteaucitron.parameters.cookieName + '=' + cookie + '!' + key + '=' + status,
-                domain = (tarteaucitron.parameters.cookieDomain !== undefined && tarteaucitron.parameters.cookieDomain !== '') ? 'domain=' + tarteaucitron.parameters.cookieDomain + ';' : '';
+                domain = (tarteaucitron.parameters.cookieDomain !== undefined && tarteaucitron.parameters.cookieDomain !== '') ? '; domain=' + tarteaucitron.parameters.cookieDomain : '';
+                secure = location.protocol === 'https:' ? '; Secure' : '';
 
             d.setTime(expireTime);
-            document.cookie = value + '; expires=' + d.toGMTString() + '; path=/;' + domain;
+            document.cookie = value + '; expires=' + d.toGMTString() + '; path=/' + domain + secure + '; samesite=lax';
         },
         "read": function () {
             "use strict";