diff --git a/lib/planner/tasks.ex b/lib/planner/tasks.ex
index c64d00b..4b3c9b3 100644
--- a/lib/planner/tasks.ex
+++ b/lib/planner/tasks.ex
@@ -160,6 +160,12 @@ defmodule Planner.Tasks do
     |> Repo.update()
   end
 
+  def unfinish_task_by_id!(id) do
+    get_task!(id)
+    |> Task.unfinish_task()
+    |> Repo.update()
+  end
+
   def verify_task_id_from_url(task_id) do
     task_id =
       case UUID.dump(task_id) do
diff --git a/lib/planner/tasks/task.ex b/lib/planner/tasks/task.ex
index 121330d..cf97f7f 100644
--- a/lib/planner/tasks/task.ex
+++ b/lib/planner/tasks/task.ex
@@ -26,6 +26,10 @@ defmodule Planner.Tasks.Task do
     change(task, finished_at: now())
   end
 
+  def unfinish_task(task) do
+    change(task, finished_at: nil)
+  end
+
   def preview(task) do
     hd(String.split(task.value, "\n"))
   end
diff --git a/lib/planner_web/live/tasks_components.ex b/lib/planner_web/live/tasks_components.ex
index aa9f6f5..8789e27 100644
--- a/lib/planner_web/live/tasks_components.ex
+++ b/lib/planner_web/live/tasks_components.ex
@@ -86,7 +86,11 @@ defmodule TaskComponent do
                 phx-value-task-id="<%= @task.id %>">
               </button>
             <% _ -> %>
-              !
+              <span
+                class="pointer"
+                phx-click="unfinish-task" phx-value-task-id="<%= @task.id %>">
+                !
+              </span>
             <% end %>
         </div>
         <div class="ml-5-5">
diff --git a/lib/planner_web/live/tasks_live.ex b/lib/planner_web/live/tasks_live.ex
index c4ffc21..4dba104 100644
--- a/lib/planner_web/live/tasks_live.ex
+++ b/lib/planner_web/live/tasks_live.ex
@@ -194,6 +194,12 @@ defmodule PlannerWeb.TasksLive do
     {:noreply, push_patch(socket, to: route)}
   end
 
+  def handle_event("unfinish-task", %{"task-id" => task_id}, socket) do
+    {_, _} = Tasks.unfinish_task_by_id!(task_id)
+    route = get_index_route(socket)
+    {:noreply, push_patch(socket, to: route)}
+  end
+
   def handle_event("new-task", %{"task" => task_params}, socket) do
     add_new_task(task_params, socket.assigns.active_plan, socket)
   end