@@ -265,8 +265,8 @@

 (defn history []

   (let [history (re-frame/subscribe [::subs/cmd-history])]

     [:ul {:class (styles/history-style)}

-      (for [item @history]

-        [:li (-> item :input input) (-> item :output output)])]))

+      (for [[index item] (enumerated @history)]

+        ^{:key index} [:li (-> item :input input) (-> item :output output)])]))

 (defn main-panel []

   [:div {:class (styles/screen)}