diff --git a/frontends/etiquette_flask/templates/tags.html b/frontends/etiquette_flask/templates/tags.html
index 350196e..75bfc22 100644
--- a/frontends/etiquette_flask/templates/tags.html
+++ b/frontends/etiquette_flask/templates/tags.html
@@ -247,7 +247,7 @@ function easybake_form()
 function tag_action_callback(response)
 {
     datas = response.data;
-    if (!(datas instanceof Array))
+    if (!Array.isArray(datas))
     {
         datas = [datas];
     }